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Breville BOV450XL Mini Smart vs Oster French Door Toaster Oven Side-by-Side Comparison

Alan Nguyen
Reviewer
Nguyen Ntk
Visual Specialist
Updated

Breville BOV450XL Mini Smart Toaster Oven

Oster French Door Toaster Oven

Tested Using Methodology v1.0
Updated Apr 3, 2023
Tested Using Methodology v1.0
Updated Apr 3, 2023
The front of a closed stainless steel Breville BOV450XL Mini Smart Toaster Oven on a white background.
The front of a closed Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven. The control panel is positioned vertically on the right. Inside the oven are a shining light, two baking racks, and one baking pan.

Our Verdict

6.5
Overall Score
  • Performance (50%)
    6.8/10
  • Design (25%)
    6.4/10
  • Usability (25%)
    6.2/10
6.5
Overall Score
  • Performance (50%)
    6.4/10
  • Design (25%)
    6.7/10
  • Usability (25%)
    6.4/10

The Breville BOV450XL Mini Smart and the Oster French Door Convection Toaster Oven (TSSTTVFDDG), interestingly, have similar overall scores. Here’s the catch though, the first one is small while the second is extra large and they also have similar prices.

The Breville’s higher power output allowed it to score higher in baking fries and especially toasting bread—our most crucial performance test—earning it the decisive edge to win against the Oster. On the other hand, the Oster’s nichrome heating elements and convection system allowed it to beat the Breville in baking pizza and roasting whole chicken.

The two toaster ovens have equal scores in terms of design. The Breville has a higher build quality shown in its thicker casing and well-designed control panel. Meanwhile, the Oster evened out the score with its convection system, interior light, and distinguished french door.

Both units were simple to use, but none were particularly convenient. The Breville has a non-stick interior coating for easy cleaning while the Oster’s large cooking chamber makes it easy to work around in general. The Oster’s flat buttons don’t respond as well and the information displayed on the LCD isn’t as detailed as the Breville’s.

Inconsistent Heating

Breville Mini Smart Toaster Oven Performance

Oster French Door Toaster Oven Performance: Medium Heat Only
6.8
Performance Scores
  • Toast (40%)7.8/10
  • Pizza (25%)5.5/10
  • Whole Roasted Chicken (25%)6.6/10
  • Baked French Fries (10%)6.5/10
6.4
Performance Scores
  • Toast (40%)6.0/10
  • Pizza (25%)6.3/10
  • Whole Roasted Chicken (25%)8.1/10
  • Baked French Fries (10%)4.1/10
7.8

Toast

6.0
From left to right, 24 pieces of toast for the top and bottom of three toast levels including lighter, medium, and darker.
On the left: Level 3; In the middle: Level 4; On the right: Level 5
From left to right, 24 pieces of toast for the top and bottom of three toast levels including lighter, medium, and darker.
The top and bottom of the best four pieces of toast from the stainless steel Breville BOV450XL Mini Smart Toaster Oven.
On the left are the top and bottom of four pieces of toast from the first batch, and on the right are from the second batch.
Taste: 8
50% * 8 = 4.0
Even Surface Color: 8
20% * 8 = 1.6
Consecutive Usability: 7.5
30% * 7.5 = 2.3
  • Function: Toast
  • Number Of Slices: 4
  • Toast Level: 4/7
  • Cooking Time: 3m
  • Second Batch: 2m 36s
  • Convection: No

After following our Toast test procedures, we determined that this oven’s toasting level 4—3 minutes on the timer—was the best option, giving it a score of 7.9/10. At level 3, the bread was very lightly toasted and at 5 was darker than ideal and had a more uneven surface color.

At toast level 4, the Breville produced 4 pieces with mottled light golden to golden-brown color which looked quite appetizing. The color was not evenly distributed due to the oven’s lack of a convection system, though, so we gave it an 8/10.

The first batch of toast was nicely crispy outside while still soft and moist inside, deserving an 8/10 score for flavor. Our head chef, Tuyet Pham, determined they would go well with pretty much anything including an omelet, eggs benedict, and particularly sandwiches.

Even though the oven automatically adjusted the timer to 2 minutes 36 seconds, the color of the second batch was a bit darker. Also, the second batch was crispier than the first which made it more suitable for soup.

Overall, it’s a 7.5/10 for consecutive usability. Remember to reduce the heat by one level if you want the same result. Thanks to its high wattage, this oven has the fastest cooking time for toast among the toaster ovens we’ve tested thus far.

Oster French Door Toaster Oven Toast Test
From left to right, 24 pieces of toast for three toast levels including lighter, medium, and darker. On the upper row are the top sides, and on the lower row are the bottom sides of the toast.
The best four pieces of toast from the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven. On the left are the top sides, and on the right are the bottom sides of the toast.
On the left are four pieces of toast from the first batch, and on the right are from the second batch. On the upper row are the top sides, and on the lower row are the bottom sides.
Taste: 6
50% * 6 = 3.0
Even Surface Color: 6
20% * 6 = 1.2
Consecutive Usability: 6
30% * 6 = 1.8
  • Function: Toast
  • Number Of Slices: 4
  • Toast Level: 4/6
  • Cooking Time: 7m 25s
  • Second Batch: 5m 31s
  • Convection: No

We began our Toast test on the Oster with the default toast level 4 and got pretty good results right off the bat. For good measure, we continued to try the toast level 3, which failed to color evenly within the stipulated time.

We then tried level 5 only to end up with burnt toast and not the expected deep brown shade. Regretfully, while level 4 was the best toast level, it didn’t score high on our benchmark scale—only 6/10.

On this setting—7 minutes 25 seconds on the timer—the four pieces of bread on the upper tray were toasted to a nice golden brown color. However, the color became dark towards the edges, especially where the bread was less dense.

Additionally, a large portion of the bottom right piece of toast was significantly lighter, possibly indicating a cold spot in the cooking chamber. With such unevenness, we could only score the surface color a 6/10 despite the overall golden brown hue.

Moreover, due to the lengthy toasting time, the toast became very crispy but dry on the inside. Our head chef, Tuyet Pham, said this crispiness would be great for eggs benedict and especially soup, but maybe not omelets and sandwiches. Unfortunately, the dark edges produced a bitter taste, preventing it from getting higher than a 6/10 from our chef.

We toasted the second batch of four slices immediately after the first. We chose level 4 again whereupon the oven automatically calibrated the timer to 5 minutes 31 seconds.

Since the oven was already hot, the aforementioned cold spot became less apparent. The toast was not as crispy nor dry as the first batch, which made it more suitable for sandwiches and omelets.

However, the burnt edges were still a problem, so the oven received one final 6/10 for consecutive usability. If you want better results for the second batch, we recommend decreasing the toast level by one.

5.5

Pizza

6.3
A toaster oven baked 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top inside a baking pan.
A toaster oven baked 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top inside a baking pan.
Two slices of oven baked 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top of one another.
Two hands break apart a slice of pizza with melty cheese, meat, and green bell peppers on top baked using a toaster oven.
Cooking Time: 0
20% * 0 = 0.0
Crust: 7
20% * 7 = 1.4
Toppings: 6.5
30% * 6.5 = 1.9
Taste: 7
30% * 7 = 2.1
  • Function:  Bake
  • Temperature: 450°F
  • Cooking Time: 10m 30s
  • Convection: No

The Breville oven did not agree with the 9-inch thick-crust meat pizza we tried to bake. We gave it a score of only 5.5/10.

This oven took 10m 30s to bake the pizza which was only slightly longer than the recommended 10 minutes on the label. However, 10 minutes was the time limit of our Pizza test, so it failed the cooking time section.

The crust had a nice golden color but was soft and dry—a possible consequence of the long cooking time. Therefore, we could only give it a 7/10.

The toppings were mostly dry with uneven color. Plus, the cheese wasn’t well melted, so it received a 6.5/10.

After tasting, our chef gave the pizza a 7/10.

Oster French Door Toaster Oven Pizza Test
A toaster oven baked 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top. The pizza is inside a grooved silver baking pan on a white background.
Two slices of toaster oven baked pizza on top of one another. It’s a 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top. The pizza is inside a grooved silver baking pan.
On a white background, two hands break apart a slice of baked pizza using a toaster oven with cheese, meat, and green bell peppers on top.
Cooking Time: 9
20% * 9 = 1.8
Crust: 5.5
20% * 5.5 = 1.1
Toppings: 6
30% * 6 = 1.8
Taste: 5.5
30% * 5.5 = 1.6
  • Function: Turbo Convection
  • Temperature: 450°F
  • Cooking Time: 6m
  • Convection: Yes

For this pizza test, we didn’t choose the oven’s 400°F pizza preset because it didn’t match our Pizza test requirement of 450°F. Instead, we chose Turbo Convection as a suitable setting for baking pizza. Nonetheless, the results were not so favorable scoring only 6.4/10 on our testing scale.

We were, however, impressed that the oven only took 9 minutes to bake a 9-inch thick-crust meat pizza placed on the upper rack level. According to our accumulated data on average toaster oven performance, this deserved a 9/10.

Unfortunately, the oven lacks the high-intensity heating capability needed to crisp a crust effectively in such a short period of time, which the Toshiba AC25CEW-BS has. Consequently, parts of the crust bottom stuck to the grooves of the baking tray and the surface had a light golden color - so the score was only 5.5/10.

We had to stop baking because some of the meat and parts of the cheese started charring. It was a shame that the cheese didn’t completely melt before this, so we could only give the toppings a 6/10.

We were able to prevent the toppings from burning and the potential bitter taste. However, the crust and the topping weren’t good enough for the taste of the pizza to get a score higher than 5.5/10 from our chef.

6.6

Whole Roasted Chicken

8.1
A whole roasted chicken using a toaster oven on an enamel baking pan on a white background.
A whole roasted chicken using a toaster oven on an enamel baking pan on a white background.
A tray of whole toaster oven roasted chicken. The thermometer has two probes inside the chicken and displays 168°F and 171°F.
Seven pieces of a carved chicken including a carcass, two breasts, two wings, and two thighs on an enamel baking pan.
The chicken thigh is slightly pink near the bone. In the white background is the rest of the roasted chicken on a baking pan.
Cooking Time: 7.5
20% * 7.5 = 1.5
Skin: 5.5
20% * 5.5 = 1.1
Doneness: 7
20% * 7 = 1.4
Taste: 6.5
40% * 6.5 = 2.6
  • Function: Bake
  • Temperature: 350°F
  • Cooking Time: 1h 5m
  • Convection: No

The Breville could barely fit the 3 lb chicken for our Whole Roasted Chicken test and scored a 6.9/10. The chicken grazed the safety guards that protect the upper heating elements while we were putting it in. During the roasting, quite a bit of grease splashed inside the oven and caused the heating elements to smoke a little.

The oven took 1h 5m to cook the chicken which was just 5 minutes longer than what we consider standard, so it got a 7.5/10.

After roasting, the skin had a quite even coloring although a bit too light, and remained soft. We awarded it a 7/10. In addition, the skin on the back got stuck to the baking pan during roasting.

The chicken’s internal temperature was 168-171°F which was very close to the USDA recommendation. However, there were a few pink spots near the bone, so we gave it a 7/10.

Even though the meat was juicy, the unappetizing chicken skin was enough that our chef lowered the score to 6.5/10 for taste.

Oster French Door Toaster Whole Roasted Chicken Test
A whole roasted chicken using a toaster oven on a white background. The chicken is belly up on a baking rack with a silver baking pan below.
A whole chicken roasted using a toaster oven on a baking rack with a silver baking pan below. The thermometer displays the same temperature of 181°F from two probes inserted into the right and left thighs of the chicken.
The roasted chicken is carved into ten pieces on a baking rack with a silver baking pan below. There are three pieces of the carcass, two wings, two thighs, two breast pieces, one drumstick, and two fallen leg bones.
Two hands pulling apart a juicy chicken thigh roasted in a toaster oven. In the white background is the rest of the roasted chicken on a baking rack with a silver baking pan below.
Cooking Time: 7
20% * 7 = 1.4
Skin: 7.5
20% * 7.5 = 1.5
Doneness: 9.8
20% * 9.8 = 2.0
Taste: 8
40% * 8 = 3.2
  • Function: Turbo Convection
  • Temperature: 350°F
  • Cooking Time: 1h 10m
  • Convection: Yes

The spacious interior of the Oster seemed a key factor in our Whole Roasted Chicken test, scoring an impressive 8.1/10. We placed a 3 lb chicken belly-up on the upper rack level and flipped it after the first 40 minutes.

After 1 hour and 10 minutes, the skin reached an acceptable roasted color scoring a 7/10 for cooking time. Our chef surmised that further roasting wouldn’t result in better skin caramelization. Thus, we stopped roasting to avoid overcooking the meat and inadvertently lowering the total score.

The skin had an appetizing golden color, except for the sides of the two drumsticks which were a little lighter in color. Compared to other benchmark tests, the skin only crisped slightly indicating the heating elements and convection system to be less than ideal/top-of-the-range. The results were good, enough for a 7.5/10.

In conclusion, the oven maintained an ideal temperature long enough to evenly cook an entire chicken throughout. We measured the internal temperature of the chicken and it was 181°F. This was very surprising and almost spot-on with the recommended 165°F - 180°F by the USDA—thus earning a whopping 9.8/10 for doneness.

Interestingly, the meat came out so tender that the bone simply fell off as we tried to carve the chicken. If the skin was crispier, the chicken would have received a higher than 8/10 for taste.

6.5

Baked French Fries

4.1
Pieces of baked french fries using a toaster oven on an enamel baking pan on a white background.
Pieces of baked french fries using a toaster oven on an enamel baking pan on a white background.
A close-up of pieces of baked french fries using a toaster oven on an enamel baking pan on a white background.
Six pieces of broken-up baked french fries are stacked on top of pieces of whole fries on an enamel baking pan.
Cooking Time: 5
20% * 5 = 1.0
Color: 7
20% * 7 = 1.4
Texture: 6.5
20% * 6.5 = 1.3
Taste: 7
40% * 7 = 2.8
  • Function: Bake
  • Temperature: 400°F.
  • Cooking Time: 25 m
  • Convection: No

The Breville did an acceptable job of baking 12 oz of french fries, scoring a 6.5/10.

It took 25 minutes, the limit of our Baked French Fries test, so this oven got a 5/10.

Except for a few golden pieces, the fries mostly lacked color. They only deserved a score of  7/10.

The fries had a variety of textures, none of which were good. The golden fries were dry and yet only slightly crispy. Also, the ones that lacked color were really soft, so it was only a 6.5/10.

Our chef gave the fries a 7/10 for taste.

Oster French Door Toaster Baked French Fries Test
Pieces of baked french fries using a toaster oven inside a silver grooved baking pan on a white background.
A closeup of pieces of baked french fries using a toaster oven inside a silver grooved baking pan.
Pieces of baked french fries using a toaster oven. Eight pieces of broken-up fries are stacked on top of pieces of whole fries inside a silver grooved baking pan.
Cooking Time: 0
20% * 0 = 0.0
Color: 5
20% * 5 = 1.0
Texture: 5.5
20% * 5.5 = 1.1
Taste: 5
40% * 5 = 2.0
  • Function: Turbo Convection
  • Temperature: 400°F
  • Cooking Time: 30 m
  • Convection: Yes

For our Baked French Fries test, the Oster was disappointing, scoring only 4.1/10. Our reasoning was the poor size ratio of the cooking chamber to the oven’s power output. The oven wasn’t able to maintain a high enough temperature for baking frozen fries, as opposed to the Ninja DT201.

After 30 minutes the fries showed no significant change in color—where the test time limit was 25 minutes! Therefore, we had no choice but to stop baking and give the fries a 0/10 for cooking time.

Most fries had a pale color as if they were air-dried instead of air-fried. Some small pieces had a light golden color, but that wasn’t enough to score higher than 5/10.

Texture-wise, the fries were soft but dry on the outside, barely enough for a 5.5/10. All things considered, the only silver lining was that the fries were cooked, so our chef gave them a 5/10 for taste.

Can Be Improved With a Convection System

Breville BOV450XL Design

Oster XL French Door Countertop Toaster Oven Design Review: Aesthetic Only
6.4
design Scores
  • Exterior (20%)6.0/10
  • Interior (30%)4.0/10
  • Build Quality (50%)8.0/10
6.7
design Scores
  • Exterior (20%)8.0/10
  • Interior (30%)7.0/10
  • Build Quality (50%)6.0/10

In the Breville BOV450XL Mini Smart Toaster Oven Box

In the Oster TSSTTVFDDG Double-Door Convection Toaster Oven Box
An oven rack, 5 pieces of document, the Breville BOV450XL Mini Smart Toaster Oven, a box, and an enamel baking pan.
  • Model: BOV450XL
  • Warranty: 1-year limited
  • User Manual
  • Baking Rack
  • Baking Pan

On the packaging were some illustrations and basic information, and the oven was couched nicely between two foam pads. Breville’s user manual explains in detail how each oven function works. 

The default accessories, a baking rack and baking pan, were packaged in a fitted carton box. You can opt to buy a separate 11” pizza pan and/or a broiling rack to cover more cooking methods.

Top to bottom and left to right are a blue box, the Oster TSSTTVFDDG Toaster Oven, one baking rack, one baking rack with supports, a user manual, and a silver grooved baking pan on a white background.
  • Model: TSSTTVFDDG
  • Warranty: 1 year (US and Canada only)
  • User Manual
  • Baking Rack x 2
  • Baking Pan
  • Removable Crumb Tray

The Oster TSSTTVFDDG arrived boxed between two styrofoam brackets. The four accessories were packaged inside carton boxes and taped to the oven. While the box only has some basic information,  a complete user manual was inside.

6.0

Exterior

8.0
A closed front of the Breville BOV450XL Mini Smart Toaster Oven with exterior measurements on a white background
A closed front of the Breville BOV450XL Mini Smart Toaster Oven with exterior measurements on a white background
The front of a closed stainless steel Breville BOV450XL Mini Smart Toaster Oven has a control panel and the right has holes.
The back and left sides of the Breville BOV450XL Toaster Oven have holes. The back has a power cord and two buffers.
The top of the stainless steel Breville BOV450XL Mini Smart Toaster Oven on a grey background.
On a grey background, the bottom of the stainless steel Breville BOV450XL Mini Smart Toaster Oven has four stands and holes.
View from the top onto a slide-out crumb tray of the Breville BOV450XL Mini Smart Toaster Oven on a grey background.
  • Weight:
    10.0 lbs (4.5 kg)
  • Length:
    15.7" (40.0 cm)
  • Width:
    14.2" (36.0 cm)
  • Height:
    8.9" (22.5 cm)
  • Material:
    Stainless steel
  • Color:
    Silver
  • Door Handle:
    cool-touch
  • Tray Indicators:
    Yes
  • Crumb Tray:
    Slide-out

The small size didn’t stop Breville from designing a sturdy stainless steel outer shell. The shape of the back buffers makes it easy to wrap the power cord around them once things have cooled.

Also, the tray-level indicators on the glass door and the slide-out crumb tray are always nice touches. However, the oven’s exterior doesn’t provide good grip points to carry the oven.

We measured the oven’s footprint to be 15.74" x 14.17" x 8.86" which was slightly different in terms of height from the manufacturer’s 16.1" x 14.2" x 10.4".

An closed front of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The exterior is 16.75 inches long, 21.53 inches wide, and 12.79 inches high.
An closed front of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The exterior is 16.75 inches long, 21.53 inches wide, and 12.79 inches high.
The front and the right sides of a closed Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The control panel is in the front. The right side has air ventilation holes.
On a white background, the back and the left sides of a closed stainless steel Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven both have air ventilation holes. The back side has a black buffer.
On a white background, the top and the right sides of a closed stainless steel Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven both have air ventilation holes. The control panel is in the front.
On a white background, the bottom of a closed stainless steel Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven has four base stands and ventilation holes. The control panel is in the front.
  • Weight:
    16.8 lbs (7.6 kg)
  • Length:
    21.5" (54.7 cm)
  • Width:
    20.0" (50.7 cm)
  • Height:
    12.8" (32.5 cm)
  • Material:
    Stainless steel
  • Color:
    Silver
  • Door Handle:
    Cool-touch
  • Tray Indicators:
    No
  • Crumb Tray:
    Removable

Considering the Oster’s large size, ventilation slats on all sides are a big plus. (+3). At first glance, the most stand-out feature was the tempered glass french door with cool-touch door handles (+3).

It has a rear buffer to maintain a cool distance from the wall, but we thought it could be greater(+2). Additionally, while the oven’s leg stoppers are sturdy, they are rather small.

Our measurements of the oven’s footprints were 21.53" x 19.96" x 12.79" which matched closely with the manufacturer’s 22" x 19.5" x 13". On a side note, we weighed the oven and it was 16.75 lbs while the manufacturer stated the entire package to be 13.87 lbs.

Control Panel

The Breville BOV450XL Mini Smart Toaster Oven’s control panel has an LCD, 1 cooking functions’ control dial, and 8 buttons
  • Type:
     LCD display + 1 control dial + 8 buttons
  • Temperature:
    120°F - 450°F
  • Timer:
    1 minute - 2 hours
  • Indicator Light:
    No
  • Status Bar:
    No
  • Light Toggle:
    No
  • Convection Toggle:
    No
  • Rotation Toggle:
    No
  • Automatic Preheat:
    Yes
  • Audio Cues:
    No

The control panel consists of 1 control knob for 8 functions and 4 buttons to set the time, temperature, and/or toasting mode. The digital display and the Start/Cancel button both shine blue when the oven’s plugged in and red when it’s cooking.

Beyond the standard stuff, you’ll find 3 unique buttons: Temperature Conversion (°F-°C), Frozen Foods, and A Bit More. The latter adds a specific amount of time depending on the cooking function.

The LCD screen will display ‘E01’ or ‘E02’ when there is a non-resettable issue with the appliance. When this happens, immediately unplug the cord from the wall outlet and call the Breville Customer Service Center.

The ‘E03’ shows up when the oven temperature exceeds its design limit. Should this occur, unplug your oven, allow it to cool for 15 minutes, then plug it back in.

The ‘E04’ appears when the room temperature is below the set minimum. If this happens, unplug the oven and move it to a warmer area.

The control panel of the Oster TSSTTVFDDG Toaster Oven has an LCD and 15 flat buttons for Toast, Bake, Broil, Turbo Convection, Pizza, Warm, Defrost, Dehydrate, Timer, Temp, Clock, Stop/Cancel, and Start.
  • Type:
    LCD + 15 buttons
  • Temperature:
    150°F - 450°F
  • Timer:
    1 minute - 6 hours
  • Indicator Light:
    No
  • Status Bar:
    No
  • Light Toggle:
    No
  • Convection Toggle:
    No
  • Rotation Toggle:
    No
  • Automatic Preheat:
    Yes
  • Audio Cues:
    No

The Oster has an LCD and 15 flat buttons including 8 for functions, 2 for timer adjustment, 2 for temperature adjustment, a Clock button, a Stop/Cancel button, and a Start button. The oven has an automatic interior light with no toggle button.

Cooking Functions of the Breville BOV450XL Smart Toaster Oven

Cooking Functions of the Oster XL Digital Convection Toaster Oven
  • Toast (7 levels, 4 slices maximum)
  • Bagel (7 levels, 4 slices maximum)
  • Bake (1h 30m maximum)
  • Broil (High and Low levels, 20 minutes maximum)
  • Pizza (55 minutes maximum)
  • Roast (1h 30m maximum)
  • Cookies (55 minutes maximum)
  • Reheat (370°F maximum)

For safety reasons, all cooking functions have a predetermined timer limit after which the oven stops cooking. If you want to continue cooking, simply operate the oven in standard mode. The High setting of the Broil function does the job faster than Low and you’ll need to experiment with it to learn how quickly it cooks.

The eight cooking functions of the Oster TSSTTVFDDG Toaster Oven are in the center of the control panel. They include Toast, Bake, Broil, Turbo Convection, Pizza, Warm, Defrost, and Dehydrate. The oven’s right side has air ventilation holes.
  • Toast (level 1-6)
  • Bake (150°F-450°F)
  • Turbo Convection (150°F-450°F)
  • Broil (450°F)
  • Pizza (400°F)
  • Warm (150°F)
  • Defrost (150°F)
  • Dehydrate (150°F)

The Oster has eight cooking functions including Toast, Bake, Broil, Pizza, Warm, Defrost, Dehydrate, and Turbo Convection. Despite the name, Turbo Convection is basically Convection Bake—meaning this oven only has one convection level.

The standard Bake function and ‘Turbo’ Convection operate in the oven’s maximum temperature range, between 150°F to 450°F. The Toast function has 6 preset levels from Light to Dark, Meanwhile, the Pizza function is set to 400°F and Broil to 450°F—meaning neither can be adjusted.

The user manual recommends not to preheat the oven when using Defrost and Dehydrate. These two functions are set to 150°F—the lowest possible temperature —and cannot be adjusted. However, 150°F is a bit high compared to common dehydrators which operate at around 100°F.

For some reason, we couldn’t find the set temperature for Warm in the manual, but we measured the temperature to be 150°F.

4.0

Interior

7.0
The Breville BOV450XL ’s cooking chamber is black and has 4 quartz heating elements with guards and 2 guide rails.
The Breville BOV450XL ’s cooking chamber is black and has 4 quartz heating elements with guards and 2 guide rails.
The cooking chamber’s right wall of the Breville BOV450XL has 2 guide rails.
  • Heating Elements:
    4 quartz
  • Convection Fan:
    No
  • Lighting:
    No
  • Tray Levels:
    3
  • Rotisserie:
    No
  • Safety Hook:
    No

The Breville’s interior has a non-stick coating, 4 heating elements, and 3 tray levels (quite rare for its size). However, it has no internal lighting or convection system.

The oven uses 4 quartz heating elements, each with its own safety guard to prevent direct contact with baking pans and food. Unlike the more common nichrome style, these don’t heat the air in the oven, but rather radiate the infrared heat directly to the food or pan.

Overall, they produce more heat and cool down faster than nichrome. In addition, they’re easier to clean and are more energy-efficient but not as durable. However, if grease splashes onto the heating elements while cooking, it’ll leave permanent stains.

The cooking chamber of the Oster TSSTTVFDDG Toaster Oven has one nichrome heating element on top and two on the bottom, two rack levels, a shining light, and a fan cavity on the right wall.
The cooking chamber of the Oster TSSTTVFDDG Toaster Oven has one nichrome heating element on top and two on the bottom, two rack levels, a shining light, and a fan cavity on the right wall.
The cooking chamber of the Oster TSSTTVFDDG Toaster Oven has one bent nichrome heating element on top and two straight ones on the bottom, two rack levels, a light, and a fan cavity on the right wall.
Two assembled guide rails on the right side of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven’s cooking chamber. A fan cavity is in between the two rails.
  • Heating Elements:
    3 nichrome
  • Convection Fan:
    Yes
  • Lighting:
    Yes
  • Tray Levels:
    2
  • Rotisserie:
    No
  • Safety Hook:
    No

The Oster uses three nichrome heating elements with an unusual looped design for the upper heating element (+3). Most similar large-capacity ovens we have examined have four upper heating elements, two bottom heating elements, and a combined power draw of 1800 W.

However, the Oster has only one upper heating element which bends across and around the cooking chamber’s ceiling to cover the same area as would four. Since the power draw is divided equally between working heating elements, we speculated this design choice was to accommodate the oven’s lower power draw of 1500 W.

The TSSTTVFDDG claims to have ‘easy clean interior walls’. While they are not grease-proof, our cleaning test showed that the oven was, indeed, easy to clean (+1).

The convection fan is situated on the right side of the cooking chamber (+2). While the oven has an interior light, it’s fully automatic with no manual operation (+2).

Having only two rack levels, the oven doesn’t really require guides on the glass door (-1). The manual recommends using the upper rack position for toast and pizza, and the lower one for other foods. It’s worth noting that the rack guide rails are assembled parts and not hollowed out of the cooking chamber’s walls like many other toaster ovens.

The baking rack should not be slid into the lower rack slot with the baking tray attached to the bottom. This will result in direct contact with the bottom heating elements.

Capacity of the Breville Smart Toaster Oven

Capacity of the Oster Double Door Oven
An opened front of the Breville BOV450XL Mini Smart Toaster Oven with interior measurements on a white background.
  • Length:
    11.5" (29.2 cm)
  • Width:
    11.0" (27.9 cm)
  • Height:
    6.7" (17.0 cm)

The BOV450XL had enough space for four slices of toast, an 11-inch pizza, or barely a 3 lb whole chicken.

We measured the cooking chamber’s volume to be 13.86 liters compared to the manufacturer’s provided capacity of 12.74 liters. However, it could just be because we measured from the cooking chamber’s walls to walls whereas the manufacturer stopped before reaching the heating elements.

An opened front of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The cooking chamber is 15.75 inches long, 16.53 inches wide, and 10.04 inches high.
  • Length:
    15.8" (40.0 cm)
  • Width:
    16.5" (42.0 cm)
  • Height:
    10.0" (25.5 cm)

According to the manufacturer, the TSSTTVFDDG can take 14 slices of toast and two 16-inch pizzas on its two racks. However, our hands-on testing proved it fits only 12 slices (6 per rack, each requiring at least 4.5 x 4.5 inches of space)  or a 15-inch pizza. While it wasn’t clear what the maximum size for a whole chicken was, our tests indicated plenty of room for a 3 lb bird.

The manufacturer doesn’t state the interior capacity, but we measured the cooking chamber volume to be around 42.83 liters—our biggest number to date. However, we felt only two rack slots didn’t do justice to the oven’s capacity.

Power Cord

A three-pronged plug power cord. In the background is the stainless steel Breville BOV450XL Mini Smart Toaster Oven.
  • Length:
    40.9" (104.0 cm)
  • Type:
    3-prong plug
  • Power:
    1800 W
  • Rated Output:
    110 V - 120 V ~ 60 Hz

The power cord is roughly 40.94"—plenty of length for household use—and can be wrapped around the back buffers for storage. The plug also has a nice little handle which makes it easier to grab.

A two-pronged plug power cord. In the background is the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven.
  • Length:
    25.8" (65.5 cm)
  • Type:
    2-prong plug
  • Power:
    1500 W
  • Rated Output:
    120 V ~ 60 Hz

The power cord is 25.79" long which is enough for household use. However, it could be a bit longer since a toaster oven as large as the Oster requires at least 5 inches of clear space on all sides. The oven doesn’t have storage space for the cord like some ovens do.

Baking Rack

Accessories

Baking Rack x 2
A stainless steel baking rack of the stainless steel Breville BOV450XL Mini Smart Toaster Oven on a grey background.
  • Length:
    11.5" (29.2 cm)
  • Width:
    10.3" (26.3 cm)
  • Height:
    0.3" (0.7 cm)
  • Material:
    Stainless steel
  • Dishwasher Safe:
    Yes

The rack fits perfectly on the guide rails, which helps prevent accidents when placing your food in the oven.

A stainless steel baking rack with two supports below of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background.
A stainless steel baking rack with two supports below of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background.
A stainless steel baking rack of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background.
  • Length:
    15.7" (39.8 cm)
  • Width:
    16.1" (41.0 cm)
  • Height:
    0.7" (1.8 cm)
  • Material:
    Stainless steel
  • Dishwasher Safe:
    Yes

The Oster has two slightly different baking racks. One is the standard rack type, while the other has two supports below to slide the baking pan under.

Baking Pan

Accessories

Baking Pan
A enamel baking pan of the stainless steel Breville BOV450XL Mini Smart Toaster Oven on a grey background.
  • Length:
    10.6" (27.0 cm)
  • Width:
    10.6" (27.0 cm)
  • Height:
    1.2" (3.0 cm)
  • Material:
    Stainless steel with enamel coating
  • Dishwasher Safe:
    Not advisable

Although the baking pan is a bit smaller than the rack, it still has more than enough space for a 3 lb chicken. Thus, it keeps most of the mess off the heating elements. 

However, even with the enamel coating, the chicken skin still stuck to the pan during our roasting test. Also worth noting is that the dishwasher can damage this coating.

A silver baking pan of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background.
  • Length:
    14.13
  • Width:
    11.8" (30.0 cm)
  • Height:
    1.1" (2.9 cm)
  • Material:
    Stainless steel
  • Dishwasher Safe:
    Not advisable

The baking pan has ridges and grooves for creating attractive roast markings and catching drippings. It also has wide edges for a firm fit on the baking rack supports, unlike some other designs we’ve seen.

However, it’s not big enough to fit into the rack rail guides and can only go on top of a rack or attached beneath. This means it doesn’t make full use of the oven’s capacity. In addition, the tray is coated, but not completely non-stick so prone to stubborn stains.

8.0

Build Quality

6.0
The front of an opened stainless steel Breville BOV450XL Mini Smart Toaster Oven with a baking rack and a baking pan.

The Breville is well-constructed and durable with a high power rating of 1800 W. All of its parts fit nicely and work smoothly, especially the LCD display and the buttons.

Thanks to the good insulation of the casing, the oven gets hot to the touch only after cooking for a long period of time at high heat.

An opened Oster TSSTTVFDDG XL Digital French Door Toaster Oven on a white background. Inside the cooking chamber, from the bottom up are one removable crumb tray, one baking rack, and one baking pan under another baking rack.

The TSSTTVFDDG is light for its size and has a graspable rectangular shape making it easy to carry or position on a counter (+2). It also has a sturdy build and durable stainless steel casing (+4). The LCD is black while the numbers are yellow and the settings are red, making everything easy to see (+1).

Unfortunately,  we found that the flat buttons often required some force to register (-1). Moreover, the door hinge could be firmer thus preventing the door from slamming shut.

Flawed Technology

Breville Mini Toaster Oven Usability Review

Oster TSSTTVFDDG Digital French Door Toaster Oven Usability: Could Be Improved
6.2
usability Scores
  • User Control (30%)8.0/10
  • Ease of Use (50%)4.0/10
  • Cleanability (20%)9.0/10
6.4
usability Scores
  • User Control (30%)8.0/10
  • Oster French Door Toaster Oven Ease of Use (50%)5.0/10
  • Cleanability (20%)7.5/10
8.0

User Control

8.0

The Temperature Conversion button is a nice touch for international users. The cooking time can be adjusted in increments of 1 minute and the temperature in increments of 5°F. For some reason, this differs from what the user manual states.

The manual says that the FROZEN FOODS button adds the right amount of additional time needed to defrost the target foods in the Toast, Bagel, Pizza, Cookies, and Bake functions. However, we didn’t find it very useful since cooking time depends heavily on the food quantity and personal preference.

The A BIT MORE button, where each press adds a pre-set amount of time to each function, has a similar problem. It only seemed useful when the oven was still cold and we wanted to skip the preheating phase.

The Oster’s controls are easy to understand since what you see is what you get (+2). Therefore, the LCD doesn’t provide any extra information but it’s easy to read (+2).

The buttons have only a single function and are easy to tell apart(+2). Although the manual says you can press the Stop/Cancel button twice to turn off the oven, we weren’t able to do so (-1).

The temperature can be adjusted in increments of 5°F and the timer runs from one minute to six hours, which is quite impressive (+1). Time can be adjusted in increments of 1 minute up to  2 hours and in increments of 0.5 hours above 2 hours (+1).

To set up the clock, press the clock button once and the clock will flash. Then, use the arrow keys to set the hour and press the clock button again to likewise set the minutes. Finally, push the clock button or the start button to set the time (+1).

4.0

Ease of Use

Oster French Door Toaster Oven Ease of Use

The Breville has an automatic preheating phase that lasts 1m 45s. Our tests saw it reaching around 180°F in that time. The temperature alert will sound when the oven reaches your selected temperature. Then, it will sound three times at the end of the cooking cycle.

It’s very easy to adjust cooking settings during use, especially compared to an analog unit like the Mueller MT-175. However, even though this oven doesn’t turn off upon opening the door, the door won’t stay partially open – it’s all or nothing.

According to the manufacturer, the Element iQ System’s smart algorithms focus power where and when it’s most needed, creating ideal cooking conditions every time. However, we didn’t notice a significant difference in performance when comparing it to other ovens of the same size/wattage.

If it’s not actively cooking, the oven will go into STANDBY mode after 10 minutes with no interaction. Although unplugging the oven resets your customized setting, Breville recommends doing so anyway after you finish using it.

As you select a function, the corresponding icons will illuminate in the LCD screen. The TSSTTVFDDG has an automatic preheat phase which is only applicable for the Bake and Turbo Convection Bake functions (+1).

After setting the time and temperature, you then push start and the display will show PrE indicating the oven is in the preheating phase. You can bypass this phase by pressing the start button a second time.

Preheating takes roughly 5 minutes to around 300°F regardless of the  temperature you set. You can readjust the time and temperature only after the preheating phase.

Interestingly, we found that the oven would return to preheat mode after adjusting the temperature until the new input temperature was reached and not just 300°F. This is also stated in the user manual.

The racks fit perfectly into the rail guides thus preventing accidents when placing food in the oven (+3). When the cooking cycle begins, the interior light will turn on automatically and then off when the cooking cycle ends (+2).

The french door and its cool-touch handle allow you to stay away from the heat wave when opening after cooking (+4). The doors are also single-pull which is very convenient. However, the doors cannot open partially and can slam shut if your hand slips (-2).

Unlike some ovens, opening the door doesn’t stop the oven or the interior light (-2). The oven casing can get very hot after long cooking times at high temperatures, so you should take care (-1).

When the cooking cycle finishes, the oven will beep once, switch off the heat, and return to the clock screen. It’s advised to unplug the oven after use.

9.0

Cleanability

7.5
Grease on the back of the stainless steel Breville BOV450XL Mini Smart Toaster Oven’s glass door.
Grease on the back of the stainless steel Breville BOV450XL Mini Smart Toaster Oven’s glass door.
Brushing the upper heating element’s guards of the stainless steel Breville BOV450XL Mini Smart Toaster Oven’s glass door.
Grease and chicken skin stuck on the enamel baking pan of the stainless steel Breville BOV450XL Mini Smart Toaster Oven.
The cleaned enamel baking pan of the stainless steel Breville BOV450XL Mini Smart Toaster Oven.

We cleaned the Breville in accordance with our toaster oven cleaning guide. Thanks to the stainless steel exterior and non-stick interior, it was very easy to clean. Removing crumbs was also easy thanks to the slide-out crumb tray, although we still had to tilt the oven to get the last of them out.

The upper heating elements got stained by smoke from splattered grease during our roasted chicken test. Fortunately, we had no problem removing the stains by brushing the elements with a paste of baking soda and water. We were also able to easily scrub the burnt chicken skin off of the baking pan.

A silver baking pan of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven with some stains on it on a white background.

The stainless steel exterior of the Oster was very easy to clean (+2). Even though the interior doesn’t have a non-stick coating, there are no tricky nooks and crannies, so cleaning didn’t require much labor (+4).

After roasting a chicken, the baking pan accumulated some stubborn stains which we were able to remove even with a baking soda paste and water (+1.5). We were worried the grease could splash inside the fan cavity while cooking, but this was not the case.