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Mueller 4 Slice vs Hamilton Beach 31127D 6 Slice Toaster Oven Side-by-Side Comparison




Our Verdict
- Performance (50%)7.0/10
- Design (25%)5.3/10
- Usability (25%)5.2/10
- Performance (50%)6.6/10
- Design (25%)5.2/10
- Usability (25%)6.4/10
The Mueller 4 Slice and the Hamilton Beach 31127D 6 Slice are both conventional, analog toaster ovens. Considering their difference in size, it’s quite impressive that the Mueller only loses out in its overall score to the Hamilton ever so slightly.
In terms of design score, the two toaster ovens are quite equal. The Mueller has a detachable crumb tray for cleaning the interior while the Hamilton has a roll-top door that moves out of the way to bring food in and out of the oven more easily.
Both units only have analog control dials and no internal lighting so there was nothing particularly convenient about them. The Hamilton does offer more cooking space though, fitting 6 slices of toast despite being a medium size.
Their performance scores, however, was an interesting upset, with the Mueller actually winning. The Mueller was better at toasting bread, baking pizza, and roasting whole chicken in spite of its lower power draw. It only lost to the Hamilton in baking fries.
Mueller 4-Slice Toaster Oven Performance
- Toast (40%)7.5/10
- Pizza (25%)7.6/10
- Whole Roasted Chicken (25%)7.0/10
- Baked French Fries (10%)3.6/10
- Toast (40%)7.3/10
- Pizza (25%)6.6/10
- Whole Roasted Chicken (25%)6.3/10
- Baked French Fries (10%)5.1/10
Toast




- Function: Toast
- Number Of Slices: 4
- Toast Level: ⅓ to Dark
- Cooking Time: 4m
- Second Batch: 4m
- Convection: No
For our Toast test, we started off by trying the Medium Toast setting which was around 3 minutes 5 seconds on the timer. The four pieces of bread on the upper tray level came out only lightly toasted on top except for one golden brown piece. We then cranked it up to the Dark Toast setting—around 4 minutes 50 seconds on the timer—which, unfortunately, burnt the toast a bit.
Finally, we opted for the middle ground which was 4 minutes on the timer—⅓ of the rotation from Medium to Dark. This setting was tricky to get right on the time dial, so we used an external timer. It gave us the best possible toast results from this oven scoring a 7.5/10 in total.
After 4 minutes of toasting, the four pieces of toast had pretty good surface color. However, the colors varied from light golden to golden brown on both the top and the bottom, so we could only give a 7/10.
Luckily, the varied colors partially meant varied textures which were all good and deserving an 8/10. The golden brown areas had a more crispy outside while the light golden areas had a softer inside. Our head chef Tuyet Pham determined that it would go great with omelets, eggs benedict, and sandwiches but not so much with soup.
After taking out the first batch, we immediately put four more pieces inside to test the oven’s consecutive usability which ended up at 7/10. Also under the identical toasting time, the four pieces of bread became brown with an increased evenness from the first batch. While the color was a bit darker than ideal, the extra crispiness made the second batch more suitable for soups.




- Function: Toast
- Number Of Slices: 4
- Toast Level: 3/4 to Medium
- Cooking Time: 3m 30s
- Second Batch: 3m 30s
- Convection: No
We initially set the toast knob to Medium—right at the Toast icon—for our Toast test. The bread came away very dark on the bottom but barely toasted on top. Then, the halfway point to Medium gave the toast no color.
Eventually, we settled on a point 3/4 the way to Medium—around 3 minutes 30 seconds on the timer—as the best option, and awarded it a score of 7.3/10.
At our optimal toasting setting, the Hamilton Beach produced 4 pieces with a great, slightly golden-brown color. Though the oven doesn’t have a convection fan, the color distribution was about 80% even so we gave the toast an 8/10.
The first batch of toast was crispy on the outside while still soft and moist on the inside, so we gave it an 8/10 for taste. Our head chef, Tuyet Pham, said it would go very well with everything including sandwiches, soup, omelets, and eggs benedict.
The second batch represented a significant decrease in performance, scoring only 5.5/10 for consecutive usability. The toast had an uneven, dark brown color plus a burnt flavor. If you want the second batch to be the same as the first, remember to only turn the knob halfway to Medium—around 1 minute 55 seconds on the timer.
Pizza




- Function: Toast
- Temperature: 450°F
- Cooking Time: 9m
- Convection: No
For its low power draw, the Mueller did pretty well in our Pizza test with a score of 7.6/10.
The oven took 9 minutes to bake a 9-inch thick-crust meat pizza which was slightly faster than the label’s recommended 10 minutes. However, compared to our tested toaster ovens, it could only be a 6/10.
The crust had a golden color all the way through and the inside was still moist. If only the crust was a bit more crispy, it would’ve gotten higher than an 8/10.
The toppings were also caramelized quite evenly from the meat and veggies to the cheese, worthy of another 8/10. The cheese was nicely melted but the areas closer to the back of the cooking chamber were more caramelized compared to the rest.
With both the crust and the toppings being 8/10, our chef had no reason to give the pizza one final 8/10 for taste.




- Function: Bake
- Temperature: 450°F
- Cooking Time: 9m 10s
- Convection: No
This oven left a bit to be desired when we tried baking a 9-inch thick-crust meat pizza. We gave it a score of 6.6/10.
It took 9 minutes and 10 seconds to bake a pizza which was slightly faster than the recommended 10 minutes on the label. It only garnered a score of 5.8/10 after being compared to other toaster ovens in our Pizza test, though.
The crust had a good golden brown color but was soft, so we could only give it a 7/10. The toppings were caramelized unevenly and some areas of cheese got darkened. On the bright side, the toppings weren’t dry, so they got a 7/10. After tasting, our chef gave it a 6.5/10.
Whole Roasted Chicken






- Function: Toast
- Temperature: 350°F
- Cooking Time: 1h 20m
- Convection: No
The Mueller could barely fit a 3 lb chicken for our Whole Roasted Chicken test. Nonetheless, the result was quite decent at 7/10 in total. If you were to purchase this oven and use it to roast a whole chicken, we recommend cutting it open or chopping it into pieces beforehand.
We first placed the chicken backside down on the baking pan. When we slid the pan in, the top of the chicken breast grazed the upper heating element’s guard and was seared.
After the first 40 minutes, we flipped the chicken to find out that parts of the skin on the back got stuck to the baking pan. Then, when we reinsert the pan, the same problem with the breast happened to the back. Luckily, they weren’t burnt.
However, even after 1 hour and 20 minutes, most of the chicken skin still hasn’t reached a desirable color. The chicken, for the most part, looked like it was steamed and not roasted, so we gave the skin a 5.5/10.
Nonetheless, our chef decided to stop the roasting as the color wouldn’t improve anyway and to avoid overcooking the meat. This cooking time was the equivalent of a 6/10 according to our data.
With such a long cooking time, the meat had no pink spots. However, the chicken’s internal temperature was 185°F-192°F, higher than the USDA recommended 165°F-180°F. Thus, we gave it an 8.7/ for doneness.
While not the most appetizing looking, the meat was very juicy. That, combined with the slight caramelization on the skin, was enough for a 7.5/10 for taste from our chef.





- Function: Bake
- Temperature: 350°F
- Cooking Time: 1h
- Convection: No
Even though the Hamilton Beach could comfortably fit a 3 lb chicken for our Whole Roasted Chicken test, its performance was far from perfect, scoring only 6.3/10.
The oven took 1 hour—our standard for this test—to cook the chicken to a desirable color, so we gave it an 8/10.
After roasting, the skin took on an even golden color on top but only a very light caramelization on the bottom — although that was also even. Unfortunately, the skin was very soft, so we could only give it a 5.5/10.
The chicken reached an internal temperature of 165-176°F which was very close to the USDA recommendation. However, there were pink spots near the bone so we could only give it a 6/10.
The meat was acceptable in terms of texture and juiciness, but didn’t stand out as remarkable. Our chef gave the chicken a 6/10 for taste.
Baked French Fries




- Function: Toast
- Temperature: 400°F
- Cooking Time: 27 m
- Convection: No
Our Baked French Fries test brought out the Mueller’s weakness of not being able to maintain a high temperature due to its low power draw. Its even heat distribution couldn’t help much if the temperature wasn’t high enough, so the final score was 3.6/10.
We stopped the baking after 27 minutes as the fries weren’t getting any more colors. This, nonetheless, was over our time limit of 25 minutes, so it was a 0/10.
The fries had no significant color change and barely enough for a 4.5/10. We ended up with 12 oz of frozen fries that were more similar to being dried in an oven than being baked, so we gave them another 4.5/10 for texture.
Fortunately, the fries were cooked through and not soggy, so our chef could give them a 4.5/10 for taste and not a zero.




- Function: Bake
- Temperature: 400°F.
- Cooking Time: 27m 15s
- Convection: No
Baking 12 oz of french fries clearly wasn’t the Hamilton Beach oven’s forte, and it came away with a score of 5.1/10.
This oven took 27 minutes and 15 seconds to put some color into the french fries. That exceeded our time limit of 25 minutes, though, so it failed the cooking time criterion of our Baked French Fries test.
Even though the fries had some golden ends, most of them basically had no color. We gave them a 6.5/10.
Despite being spread out on the baking pan, the fries didn’t crisp up, so they got a 6/10. Our chef gave the fries a 6.5/10 for taste.
Stainless Steel Mueller 4-Slice Toaster Oven Design Review
- Exterior (20%)5.0/10
- Interior (30%)1.0/10
- Build Quality (50%)8.0/10
- Exterior (20%)7.0/10
- Interior (30%)1.0/10
- Build Quality (50%)7.0/10
In the Mueller MT-175 Small Toaster Oven Box

- Model: MT-175
- Warranty: 1 year
- User Manual
- Baking Rack
- Baking Pan
The Mueller toaster oven came in a basic packaging and positioned with two foam pads. The included accessories were simply duct-taped to the oven. Inside the box are also a user manual and a simple recipe booklet.

- Model: 31127D
- Warranty: 1-year limited in the US and 5-year limited in Canada
- User Manual
- Baking Rack
- Baking Pan
- Removable Crumb Tray
Aside from the Hamilton Beach oven itself, the box also contained a baking pan, a baking rack, a removable crumb tray, and a basic user manual.
Exterior







- Weight:9.0 lbs (4.1 kg)
- Length:15.0" (38.0 cm)
- Width:11.6" (29.5 cm)
- Height:8.9" (22.5 cm)
- Material:Stainless steel
- Color:Gray
- Door Handle:Cool-touch
- Tray Indicators:No
- Crumb Tray:Detachable
As simple as it is, the Mueller has all the standard exterior features of a small toaster oven but also something more. The bottom of the oven acts as a detachable crumb tray which not only makes it easy to remove the falling bits and crumbs but also to clean the entire interior.
The oven has a cool-touch door handle and back buffers to prevent it from being too close to the wall. Unfortunately, it has no cord storage or carrying handles.
Our measurements of the oven’s footprint were 14.96" x 11.61" x 8.86" which pretty much coincided with the manufacturer’s 14.84" x 11.85" x 8.86". However, the weight of the oven by itself was already 9 lbs whereas the label said the entire box was 7.63 lbs.






- Weight:9.3 lbs (4.2 kg)
- Length:18.5" (47.0 cm)
- Width:14.6" (37.0 cm)
- Height:9.4" (24.0 cm)
- Material:Stainless steel
- Color:Silver
- Door Handle:cool-touch
- Tray Indicators:No
- Crumb Tray:Removable
The Hamilton Beach has a stainless steel exterior. Our measurements of the oven’s footprint were 18.5" x 15.56" x 9.41"—marginally different from the manufacturer’s provided 18.74" x 15.24" x 9.41".
What stands out most is the roll-top door with a cool-touch handle. It moves up and out of the way, giving you safe and easy access to your food before, during, and after cooking.
The oven has a back buffer to prevent it from being pushed too close to the wall. Unlike many other toaster ovens, though, you can’t wrap the power cord around the buffer.
Control Panel of the Small Mueller MT-175

- Type:3 control knobs
- Temperature:150°F - 450°F
- Timer:1 minute - 30 minutes + stay-on
- Indicator Light:Yes
- Status Bar:No
- Light Toggle:No
- Convection Toggle:No
- Rotation Toggle:No
- Automatic Preheat:No
- Audio Cues:No
The Mueller has a basic analog control panel with three dials for temperature, function, and time. The time dial has a stay-on setting to help with its short range, similar to many other small toaster ovens. Interestingly, while the max temperature setting was 450°F, we actually recorded the internal temperature of the oven reaching 500°F on the said setting.

- Type:3 control knobs
- Temperature:100°F - 450°F
- Timer:1 minute - 30 minutes + stay-on
- Indicator Light:Yes
- Status Bar:No
- Light Toggle:No
- Convection Toggle:No
- Rotation Toggle:No
- Automatic Preheat:No
- Audio Cues:No
The Hamilton beach has three contoured control knobs labeled Temperature, Function, and Timer which are durable and easy to grip. While the timer only runs from 1 minute to 30 minutes, the knob has a stay-on position as well.
Cooking Functions

- Toast
- Bake
- Broil
- Keep warm
Different from most other toaster ovens, the Mueller’s Bake function only uses the lower heating elements as opposed to lower and upper. The Broil function still uses only the upper heating elements.
The Toast function is where both the lower and upper heating elements work. Nonetheless, the oven still provides all the basic functions for its intended purposes.

- Toast
- Bake
- Broil
The bake and broil functions will be all you need if you know your way around the kitchen. The temperature knob also includes a Min setting which, at 100°F, can act as a ‘keep warm’ option.
Interior



- Heating Elements:2 quartz
- Convection Fan:No
- Lighting:No
- Tray Levels:2
- Rotisserie:No
- Safety Hook:No
Similar to many other small toaster ovens, including the Comfee CFO-BB101, the Mueller lacks a convection fan and an interior light. In addition, it only has two heating elements which can usually lead to uneven heat distribution compared to four or more heating elements.
These heating elements are made of quartz which uses infrared light to cook foods faster than the more common nichrome counterparts. Quartz heating elements also cool down faster, are more energy-efficient and easier to clean but not as durable.
However, if grease splashes onto the heating elements while cooking, it’ll leave permanent stains. This is why they usually have guards which this oven also has.

- Heating Elements:4 nichrome
- Convection Fan:No
- Lighting:No
- Tray Levels:2
- Rotisserie:No
- Safety Hook:No
Unfortunately, the 31127D doesn’t have any interior features worth mentioning, not even internal lighting or a convection system like the Cuisinart TOA-60. The only thing it has is four nichrome heating elements.
Capacity of the Mueller 4-Slice Toaster Oven

- Length:10.6" (27.0 cm)
- Width:9.8" (25.0 cm)
- Height:7.5" (19.0 cm)
We could fit four slices of toast, a 9-inch pizza but we could barely fit a 3 lb chicken inside the Mueller, unlike the same-sized Breville BOV450XL. We measured the cooking chamber volume to be around 12.81 liters, slightly different than the manufacturer’s provided capacity of 11.67 liters. However, it could just be a difference in measuring standards.

- Length:13.0" (33.0 cm)
- Width:12.2" (31.0 cm)
- Height:7.7" (19.5 cm)
The Hamilton Beach has enough capacity for 6 slices of toast, a 3 lb chicken, or a 12-inch pizza.
We measured the cooking chamber’s volume to be around 19.92 liters which was vastly different from the manufacturer’s stated capacity of 10 liters. However, this could be because we measured from the cooking chamber’s walls to walls whereas the manufacturer stopped before reaching the heating elements.
Power Cord

- Length:30.7" (78.0 cm)
- Type:2-prong plug
- Power:1100 W
- Rated Output:120 V ~ 60 Hz
The power cord is 30.7 inches long, suitable for household use. Unfortunately, the oven doesn’t have any storage space for it.

- Length:35.0" (88.9 cm)
- Type:2-prong plug
- Power:1400 W
- Rated Output:120 V ~ 60 Hz
The power cord protrudes from the bottom of the oven which can create some inconvenient bends. Nonetheless, roughly 35" is plenty of cord length for household use. However, the oven doesn’t have a storage place for the cord.
Accessories

- Length:10.5" (26.7 cm)
- Width:8.8" (22.4 cm)
- Height:0.5" (1.3 cm)
- Material:Stainless steel
- Dishwasher Safe:Yes
The two sides of the baking rack have slight curves upward at an angle to keep the baking pan in place. It fits perfectly with the guide to help prevent accidents when placing your food in the oven.

- Length:13.0" (33.0 cm)
- Width:11.9" (30.2 cm)
- Height:1.0" (2.5 cm)
- Material:Stainless steel
- Dishwasher Safe:Yes
The rack fits perfectly into the guide rails, reducing the chance of an accident when placing your food in the oven.
Accessories

- Length:10.2" (25.8 cm)
- Width:7.9" (20.0 cm)
- Height:0.6" (1.5 cm)
- Material:Stainless steel
- Dishwasher Safe:Yes
The baking pan doesn’t fit into the guide rails and has to on top of the rack. This may prevent the full use of the oven’s capacity and lead to some inconveniences during cooking.
On the bright side, the pan has ridges and grooves to give your food attractive roasting marks and catch the dripping better. It has a coating but is not completely non-stick so you may need to watch out for some stubborn stains after a hefty roast.

- Length:11.3" (28.8 cm)
- Width:9.4" (23.8 cm)
- Height:0.7" (1.8 cm)
- Material:Stainless steel
- Dishwasher Safe:Yes
The baking pan is correctly sized to keep messy food from dripping directly onto the heating elements. It slides into the brackets on the baking rack’s underside, so it’s a perfect fit. Unfortunately, though it has a coating, it isn’t completely non-stick so it can accumulate some stains after a tough roasting mission.
Build Quality

For a simple small toaster oven, build quality is all about how durable it is and if it works properly. The Mueller accomplishes that with a sturdy stainless steel casing and smooth-turning dials.

The Hamilton Beach is well-constructed out of durable stainless steel. Its contoured knobs turn smoothly and are a nice simple touch.
Muller 4-Slice Toaster Oven Usability
- User Control (30%)6.0/10
- Ease of Use (50%)4.0/10
- Cleanability (20%)7.0/10
- User Control (30%)6.0/10
- Ease of Use (50%)6.0/10
- Cleanability (20%)8.0/10
User Control
Even though the Mueller only has three simple control dials, there are a few things to keep in mind. For the timer knob, when setting it to less than 10 minutes, always rotate past 10 minutes and then rotate back to the desired time.
It’s always tricky to precisely adjust time and temperature for an analog-control toaster oven and this one is no different. Nonetheless, you can use an external timer and an oven thermometer to get more accurate readings.
If you frequently use the stay-on feature, you can turn off the oven by rotating the function dial to Off instead of the timer.
The Hamilton Beach only has three simple control knobs but there are a few things to pay attention to. If you wish to set the timer knob for less than 10 minutes, you must first turn it beyond the 10-minute mark (to start the heating) and then roll it back to the setting you want.
Precisely adjusting time and temperature can be a bit difficult but it’s not a major problem. If you’re concerned, use an external timer and an oven thermometer for more accurate measurements.
Ease of Use
What’s convenient about 100% analog toaster ovens is that it’s very simple to adjust time and temperature during cooking. When the timer runs out, a bell will sound and the oven will shut off. Afterward, you can freely leave it plugged in and not worry about power consumption as it has no digital display.
The door can open at any angle < 50° to let food cool down inside the oven. However, keep in mind that opening the door doesn’t stop the oven. The exterior shell isn’t very thick, so it gets hot to the touch quite quickly during cooking.
The simple analog control panel makes it very easy to adjust settings on the fly. Once the timer counts down to the Off position, you’ll hear a chime and the oven will shut itself off. Since there’s no digital display, the oven won’t draw any more power even if you leave it plugged in.
The oven’s exterior only gets hot to the touch after a long cooking time at a high temperature. The door can be kept partially open at many degrees but keep in mind that it doesn’t switch the oven off.
Cleanability




We clean the stainless steel exterior with no problem. However, after the chicken test, there were burnt bits stuck to the upper heating element’s guard and grease on the cooking chamber’s ceiling. There was ample space between the ceiling and the upper heating element, so we proceed to try every cleaning method possible.
Unfortunately, we could only scrub off the bits. Due to the interior not having a non-stick coating, there were some permanent stains on the cooking chamber’s ceiling and the upper heating element’s guard.
Luckily, the heating element itself was intact. Also, we were able to remove the stubborn stains on the baking pan by brushing them with a paste of baking soda and water.





We cleaned the Hamilton Beach in accordance with our toaster oven cleaning guide. The oven was easy to clean thanks to its surface coatings and the fact that it has no tricky nooks and crannies.
The removable crumb tray made it easy to clean up the crumbs, though we still had to tilt the oven to get the last of them. Unfortunately, after our Whole Roasted Chicken test, the baking pan accumulated some discoloration that we weren’t able to remove even with a paste of baking soda and water.