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Instant Omni Plus 18L vs Mueller 4 Slice Toaster Oven Side-by-Side Comparison

Instant Omni Plus 18L vs Mueller 4 Slice Toaster Oven. A comparison between our best air fryer toaster oven and our best value small toaster oven.

By , , , and ·Updated

Instant Omni Plus 18L

Mueller 4 Slice

Instant Omni Plus 18L vs Mueller 4 Slice Toaster Oven

Overall Verdict

Ranking by
OverallScore Performance50% Design25% Usability25% ScoreOverall 50%Performance 25%Design 25%Usability Instant Omni Plus 18LMueller 4 Slice8.58.29.38.46.17.05.35.2
Showing: 2/2 Items

Between the Instant Omni Plus 18L Air Fryer Toaster Oven and the Mueller 4 Slice Toaster Oven (MT-175), the first one is without a doubt the winner. Nonetheless, they still bring up interesting points of comparison as our best air fryer toaster oven and our best value small toaster oven respectively.

Design and usability-wise, the Mueller doesn’t offer much besides its detachable crumb tray for cleaning the inside. Meanwhile, the Instant has an LCD touchscreen with smart programs, audio cues, toggles, and cooking presets. The oven’s also equipped with a slide-out crumb tray, interior light, and tray-level indicators on the glass door.

Even though the Mueller couldn’t compete with a true powerhouse like the Omni Plus 18L in terms of performance, it still put up a good fight, especially for a small unit.

The Mueller was able to keep up with the Omni Plus in toasting bread, which was great. However, even though its results in baking pizza and roasting whole chicken were good, the Instant’s were exceptional.

Most importantly, the Mueller still has the common weakness in baking fries like many same-sized units whereas this test was the one where the Omni Plus excelled, even among all of our best picks.

Pros & Cons

  • Informative and eye-catching package
  • Smart Programs and cooking status bar
  • Electrical safety feature for the door
  • Convenient slide-out crumb tray
  • Safeguards for all heating elements
  • Complimentary app with detailed instructions and numerous recipes
  • Helpful toggles
  • Easy-to-clean stainless steel exterior
  • Lightweight and small size
  • Easy-to-clean stainless steel exterior
  • Cool-touch door handle
  • Simple control knobs
  • Stay-on feature
  • Quartz heating elements have safeguards
  • Energy-saving
  • Touchscreen digital displays need more contrast
  • The master-control knob can be confusing
  • No convection fan
  • No internal lighting
  • No safety mechanism for the door

Key Specs

Dimensions
L16.54 x W15.75 x H13.90 inches
L14.96 x W11.61 x H8.86 inches
Weight
25.4 lbs (11.5 kg)
9.0 lbs (4.1 kg)
Control Type
black LCD digital touchscreen + one master-control knob
3 control knobs
Temperature
150°F - 450°F
150°F - 450°F
Timer
1 - 60 minutes
1 minute - 30 minutes + stay-on
Cooking Functions
8
4

Where to Buy

Price at publication
$233.55
$64.55

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Analysis and Test Results

Performance

Overall Performance Scoring
8.2
7.0

Toast

7.5
7.5
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 1; In the middle: Level 2; On the right: Level 3
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 Instant Omni Plus 18L 10-in-1 Air Fryer 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.
Mueller 4 Slice Toaster Oven Toast Test
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 Mueller MT-175 4-Slice Countertop 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.
Function
Toast
Toast
Number of Slices
4
4
Toast Level
2/5
⅓ to Dark
Cooking Time
5m 25s
4m
Second Batch
4m 1s
4m
Convection
No
No

Pizza

8.6
7.6
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.
The cross-section of a toaster oven baked pizza slice showing the crust. In the background is a pizza inside a baking tray.
Two hands break apart a slice of pizza with melty cheese, meat, and green bell peppers on top baked using a toaster oven.
Mueller 4 Slice Toaster Oven Pizza Test
 Mueller 4 Slice Toaster Oven PizzaA 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 cheese, meat, onions, and green bell peppers on top baked using a toaster oven.
Function
Bake
Toast
Temperature
450°F
450°F
Cooking Time
3m 50s
9m
Convection
High
No

Whole Roasted Chicken

8.4
7.0
A whole roasted rotisserie chicken using a toaster oven on an enamel baking pan on a white background.
A whole roasted rotisserie 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 178°F and 190°F.
Seven pieces of a carved chicken including a carcass, two breasts, two wings, and two thighs on an enamel baking pan.
The close-up of a pulled-apart roasted chicken thigh. In the background is the rest of the roasted chicken on a tray.
Mueller 4 Slice Toaster Oven Whole Roasted Chicken Test
A whole roasted chicken using the Mueller MT-175 Toaster Oven backside up on a silver baking pan on a white background.
A whole roasted chicken using the Mueller MT-175 Toaster Oven belly up on a silver baking pan on a white background.
A tray of whole toaster oven roasted chicken. The thermometer has two probes inside the chicken and displays 185°F and 192°F.
Eight pieces of a carved chicken including two carcass halves, two breasts, two wings, and two thighs on a baking pan.
Two hands pulling apart a roasted chicken thigh. In the white background is the rest of the roasted chicken on a baking pan.
Function
Roast
Toast
Temperature
350°F
350°F
Cooking Time
50 minutes
1h 20m
Convection
Yes
No

Baked French Fries

9.3
3.6
Pieces of baked french fries using a toaster oven inside an air fryer basket on a grey background.
Pieces of baked french fries using a toaster oven inside an air fryer basket on a grey background.
A close-up of pieces of baked french fries using a toaster oven inside an air fryer basket on a grey background.
Ten pieces of broken-up baked french fries are stacked on top of pieces of whole fries inside an air fryer basket.
Mueller 4 Slice Toaster Oven Baked French Fries Test
Mueller 4 Slice Toaster Oven Baked French FriesPieces of baked french fries using the Mueller MT-175 Toaster Oven on a grooved silver baking pan on a white background.
A close-up of pieces of baked french fries using the Mueller MT-175 Toaster Oven on a baking pan on a white background.
Ten pieces of broken-up baked french fries are stacked on top of pieces of whole fries on a grooved silver baking pan.
Function
Air Fry
Toast
Temperature
400°F.
400°F
Cooking Time
15m
27 m
Convection
High
No

Design

Overall Design Scoring
9.3
5.3

In the Box

An oven rack, air fryer basket, rotisserie kit, lifter, the Instant Omni Plus 18L, user manual, box, and enamel baking pan.
A box, the Mueller MT-175 4-Slice Toaster Oven, a recipe booklet, a baking pan, an oven rack, a user manual, and a brochure.

Exterior

9.5
5.0
A closed front of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven with exterior measurements on a white background.
A closed front of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven with exterior measurements on a white background.
The front of a closed Instant Omni Plus 18L 10-in-1 Toaster Oven has a control panel and the right has ventilation holes.
The back and left sides of the Instant Omni Plus 18L have air ventilation holes. The back has a power cord and two buffers.
The top of the stainless steel Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven on a grey background.
On a grey background, the bottom of the stainless steel Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven has two stands.
A closed front of the stainless steel Mueller MT-175 4-Slice Toaster Oven with exterior measurements on a white background.
A closed front of the stainless steel Mueller MT-175 4-Slice Toaster Oven with exterior measurements on a white background.
Mueller 4 Slice Toaster Oven ExteriorThe front of a closed stainless steel Mueller MT-175 4-Slice Toaster Oven has a control panel and the right has holes.
The back and left sides of the Instant Omni Plus 18L have air ventilation holes. The back has a power cord and two buffers.
The top, front, and right sides of the Black+Decker TO1760SS 4-Slice Natural Convection Toaster Oven on a white background.
On a white background, the bottom of the Mueller MT-175 Toaster Oven has a detachable crumb tray, four stands, and holes.
The detached crumb tray of the stainless steel Black+Decker TO1760SS 4-Slice Countertop Toaster Oven on a white background.
Weight
25.4 lbs (11.5 kg)
9.0 lbs (4.1 kg)
Length
16.5" (42.0 cm)
15.0" (38.0 cm)
Width
15.8" (40.0 cm)
11.6" (29.5 cm)
Height
13.9" (35.3 cm)
8.9" (22.5 cm)
Material
Stainless steel
Stainless steel
Color
Silver
Gray
Door Handle
cool-touch
Cool-touch
Tray Indicators
Yes
No
Crumb Tray
Yes
Detachable

Control Panel

The black touchscreen LCD of the Instant Omni Plus 18L Air Fryer Toaster Oven has 15 features and a master-control knob.
The control panel of the Black+Decker TO1760SS 4-Slice Toaster Oven has 3 control knobs for temperature, function, and timer.
Type
black LCD digital touchscreen + one master-control knob
3 control knobs
Temperature
150°F - 450°F
150°F - 450°F
Timer
1 - 60 minutes
1 minute - 30 minutes + stay-on
Indicator Light
Yes
Yes
Status Bar
No
No
Light Toggle
Yes
No
Convection Toggle
Yes
No
Rotation Toggle
Yes
No
Automatic Preheat
Yes
No
Audio Cues
Yes
No

Cooking Functions

The function dial of the Black+Decker TO1760SS 4-Slice Toaster Oven has 3 cooking functions including Bake, Broil, and Toast.

Interior

9.5
1.0
The Instant Omni Plus 18L’s cooking chamber has 2 bottom heating elements, 3 guide rails, a rotisserie socket and bracket.
The Instant Omni Plus 18L’s cooking chamber has 2 bottom heating elements, 3 guide rails, a rotisserie socket and bracket.
The 2 bottom quartz heating elements of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven have guards.
The cooking chamber ceiling of the Instant Omni Plus 18L Toaster Oven has two quartz and one swirl nichrome heating element.
The cooking chamber’s right wall of the Instant Omni Plus 18L has four guide rails, a rotisserie socket, and a shining light.
Mueller 4 Slice Toaster Oven InteriorThe Mueller MT-175 4-Slice Toaster Oven’s cooking chamber has 2 quartz heating elements with guards and 2 guide rails.
Mueller 4 Slice Toaster Oven InteriorThe Mueller MT-175 4-Slice Toaster Oven’s cooking chamber has 2 quartz heating elements with guards and 2 guide rails.
The Mueller MT-175 Oven has 1 bottom heating element with a guard and 2 guide rails on its right cooking chamber wall.
Heating Elements
4 quartz and 1 nichrome
2 quartz
Convection Fan
Yes
No
Lighting
Yes
No
Tray Levels
4
2
Rotisserie
Yes
No
Safety Hook
No
No

Power Cord

A three-pronged plug power cord. In the background is the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
A two-pronged plug power cord. In the background is the stainless steel Mueller MT-175 4-Slice Countertop Toaster Oven.
Length
2.8 ft (0.9 m)
30.7" (78.0 cm)
Type
3-prong plug
2-prong plug
Power
1800 W
1100 W
Rated Output
120 V ~ 60 Hz
120 V ~ 60 Hz

Accessories

A stainless steel baking rack of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven on a grey background.
A stainless steel baking rack of the Mueller MT-175 4-Slice Countertop Toaster Oven on a white background.
Length
12.4" (31.5 cm)
10.5" (26.7 cm)
Width
11.4" (29.0 cm)
8.8" (22.4 cm)
Height
0.9" (2.4 cm)
0.5" (1.3 cm)
Material
Stainless steel
Stainless steel
Dishwasher Safe
Yes
Yes

Build Quality

9.0
8.0
The front of an opened Instant Omni Plus 18L with a rack, a baking pan, an air fryer basket, a lifter, and a rotisserie kit.
The front of an opened Instant Omni Plus 18L with a rack, a baking pan, an air fryer basket, a lifter, and a rotisserie kit.
An oxidized slide-out crumb tray of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven on a grey background.
The front of an opened stainless steel Mueller MT-175 4-Slice Countertop Toaster Oven with an oven rack and baking pan.

Capacity

An opened front of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven with interior measurements on a white background.
An opened front of the stainless steel Mueller MT-175 4-Slice Toaster Oven with interior measurements on a white background.
Length
13.8" (35.0 cm)
10.6" (27.0 cm)
Width
12.6" (32.0 cm)
9.8" (25.0 cm)
Height
8.7" (22.0 cm)
7.5" (19.0 cm)

Usability

Overall Usability Scoring
8.4
5.2

User Control

9.9
6.0

Ease of Use

8.0
4.0

Cleanability

7.0
7.0
Grease on the slide-out crumb tray inside the cooking chamber of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
Grease on the slide-out crumb tray inside the cooking chamber of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
The cleaned cooking chamber floor and 2 bottom heating elements of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
Brushing the stained upper quartz heating elements of the Instant Omni Plus 18L 10-in-1 Air Fryer Toaster Oven.
Mueller 4 Slice Toaster Oven CleanabilityPermanent stains on the left cooking chamber’s ceiling and the upper heating element’s guard of the Mueller MT-175 Oven.
Mueller 4 Slice Toaster Oven CleanabilityPermanent stains on the left cooking chamber’s ceiling and the upper heating element’s guard of the Mueller MT-175 Oven.
Permanent stains on the right cooking chamber’s ceiling and the upper heating element’s guard of the Mueller MT-175 Oven.
The cleaned grooved silver baking pan of the stainless steel Mueller MT-175 4-Slice Countertop Toaster Oven.

Behind the Comparison

Headshot of Alan Nguyen
Alan NguyenReviewer

Alan Nguyen is a writer and product reviewer at HealthyKitchen101. His major in English language teaching taught him to present concise information. In addition to his cooking hobby, he values the practical aspects of household appliances.

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Lap VoTest Lead

Lap is Head of the Research, Testing, and Review Team (RTR Team) at HealthyKitchen101.com, where he directs and supervises the testing of kitchen gadgets and appliances.

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Tuyet PhamProfessional Chef

Tuyet Pham is an award-winning Saigonese chef passionate about delicious and healthful foods. At HealthyKitchen101, she develops recipes and collaborates with our Research, Testing, and Review lab to evaluate the performance of cooking appliances. Her assessments add a strong authoritative voice to our product scoring process.

Headshot of Nguyen Ntk
Nguyen NtkVisual Specialist

Nguyen Ntk is a graphic designer, photographer, and videographer whose philosophy centers around respecting and celebrating the beauty of reality. Through his lenses, Nguyen strives to capture the true essence of objects and events, showcasing and highlighting authentic features without distortion or exaggeration.

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