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Panasonic NN-SN67KS Review

Offers unmatched performance for heating frozen food, and is one of the better products available for heating food evenly, without annoying hot and cold spots
Panasonic NN-SN67KS
Top Pick Award
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Price:   $220 List
Pros:  Excellent heating, great with frozen foods, large capacity
Cons:  Expensive, so-so at defrosting
Manufacturer:   Panasonic
By David Wise and Austin Palmer  ⋅  Jan 13, 2022
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#4 of 12
  • Heating - 40% 6.8
  • Frozen Foods - 30% 9.0
  • Defrosting - 20% 4.0
  • Ease of use - 10% 6.2

Our Verdict

The Panasonic NN-SN67KS is our Top Pick for Frozen Foods in our review of best microwave ovens. It is a large-capacity microwave that stood out due to its stellar heating performance. It had one of the best performances of all when it came to premade frozen foods, heating them quickly and evenly. This kitchen appliance also provides even and consistent heating across most food items better than competing products. That said, it was surprisingly below average when it came to defrosting frozen meat. If you are looking for a microwave primarily for heating frozen foods or just hate it when a microwave leaves hot and cold areas, the Panasonic is a perfect choice.

Editor's Note: This product review was updated on January 13, 2022 with additional information about our testing processes. We awarded this microwave a Top Pick Award.

Compare to Similar Products

Panasonic NN-SN67KS
Awards Top Pick Award Editors' Choice Award Editors' Choice Award Top Pick Award Best Buy Award 
Price $220 List$250 List$120 List$170 List
$149.99 at Amazon
$75 List
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Pros Excellent heating, great with frozen foods, large capacityEven heating, integrated heat sensor, large capacityExcellent with packaged frozen foods, compact, very easy to useExcellent at defrosting, convenientInexpensive, above-average performance, compact
Cons Expensive, so-so at defrostingLarge, no time defrost, no volume adjustSo-so with mixed leftoversLarge, expensiveLow power, Amazon Alexa device required for some functions
Bottom Line Offers unmatched performance for heating frozen food, and is one of the better products available for heating food evenly, without annoying hot and cold spotsThis is a top-tier appliance with a large capacity and very even heatingFor those with limited kitchen space, this is the best compact model we testedAn excellent all-around product with a large capacity, this model has convenient features and is exceptional at defrostingThis compact model is a great value, offers good performance, and features smart home integration
Rating Categories Panasonic NN-SN67KS Panasonic NN-SN936B Kenmore 70919 Toshiba EM131A5C Amazon Basics Micro...
Heating (40%)
Frozen Foods (30%)
Defrosting (20%)
Ease of use (10%)
Specs Panasonic NN-SN67KS Panasonic NN-SN936B Kenmore 70919 Toshiba EM131A5C Amazon Basics Micro...
Wattage 1200 watts 1250 watts 900 watts 1100 watts 700 watts
Size 1.2 cu. ft. 2.2 cu. ft. 0.9 cu. ft. 1.2 cu. ft. 0.7 cu. ft.
Dimensions 20.7"W x 12.3"H x 15.8"D 19.44" x 23.88" x 14" 17.7"W x 11.0"H x 14.5"D 20.5"W x 12.8"H x 17.1"D 17.3"W x 10.1"H x 14.1"D
Turntable Diameter 13.4" 16.5" 11.2" 12.4" 10.0"
Internal Dimentions 14.4"W x 9.9"H x 13.9"D 18.4"W x 10.4"H x 18.5"D 13.6"W x 9.3"H x 12.4"D 15"W x 9.5"H x 13.1"D 10.9"W x 6.9"H x 10"D
Child lock Yes Yes Yes Yes Yes
45 Sec Heating Temp Rise 78 F 112 F 83 F 111 F 70 F

Our Analysis and Test Results

This product is the perfect microwave for frozen food fans, and a strong performer across the board. We love how it was much better than competing products at heating most food items evenly, avoiding hot and cold spots. It's one of our recommended kitchen appliances and earned a Top Pick Award in our comprehensive review of microwave ovens.

Performance Comparison

Panasonic NN-SN67KS microwave - the panasonic nn-sn67ks offers unmatched performance heating frozen...
The Panasonic NN-SN67KS offers unmatched performance heating frozen foods, although it was oddly below average at defrosting frozen meat.
Credit: Laura Casner


Our heating metric comprised 40% of each product's final overall score. We broke this metric down into five different subtests, creating heat maps, testing speed, and rating how each microwave reheated different foods.

Heat Map Test

To create a heat map, we spread a layer of marshmallow creme onto parchment paper matching the dimensions of the turntable tray and heated this on high for two minutes. Then we checked for temperature variation spots, noting any burned areas or areas that were still cold. This test makes up 35% of the Heating score.

The Panasonic NN-SN67KS did impressively well in the heat map test. We looked at both the top and the bottom, which was visible through the parchment paper, to get a good idea of how evenly it was cooked. The marshmallow fluff showed no notable burnt or undercooked spots.

The Panasonic NN-SN67KS had the best heat map test, with fairly even...
The Panasonic NN-SN67KS had the best heat map test, with fairly even light browning on the top of the marshmallow heat map after our 2-minute test.
Shown here is the bottom of the marshmallow fluff, photographed...
Shown here is the bottom of the marshmallow fluff, photographed through the parchment paper.

Heating Speed Test

For this test, which comprises 20% of the Heating score, we placed a 125 mL beaker of room temperature water in the center the microwave, and heated it for 45 seconds on high. We then measured the water temperature.

The Panasonic NN-SN67KS didn't deliver great results here, only raising the temperature of the water by 78.1°F after 45 seconds of heating, which was slightly below average.

Leftover Heating

Many of us regularly use microwaves to heat leftovers. In this metric, we heated a plate of sausage links, green beans, and mashed potatoes, noting temperature differences after running the microwave on. This test accounted for 15% of the Heating score.

We were unimpressed with the results here. This Panasonic appliance produced significant temperature variations between the food and didn't heat them all that much, performing comparably to microwaves with much lower power outputs.

Panasonic NN-SN67KS microwave - unfortunately, there was quite a thermal gradient across the plate...
Unfortunately, there was quite a thermal gradient across the plate of leftovers.
Credit: Laura Casner

Soup Heating

The ability to heat soup to the appropriate temperature accounted for 15% of the Heating score. Most microwaves we tested performed quite well in this metric, and the Panasonic NN-SN67KS was no exception.

Pizza Heating

For the remaining 15% of the Heating score, we zapped two pieces of pizza according to the microwave's instructions, then measured the temperature of each slice with a laser infrared thermometer.

The Panasonic NN-SN67KS shined brightly here, heating the pizza quickly and evenly, which proved to be a difficult task for many microwaves.

Panasonic NN-SN67KS microwave - both slices of pizza came out of the panasonic quite evenly heated.
Both slices of pizza came out of the Panasonic quite evenly heated.
Credit: Laura Casner

Frozen Foods

The Panasonic NN-SN67KS really earns its keep when it comes to heating packaged frozen items. In this test, which makes up 30% of each microwave's final score, we assess cooking performance with a Hot Pocket, a frozen burrito, and a single-serving lasagna. Using a set of digital kitchen thermometers, we compared the temperatures between zones to assess even eating of each frozen food item after cooking according to the instructions.

This microwave delivered one of the best results of the entire group, evenly heating up the frozen burrito, Hot Pocket, and individual serving of lasagna above the required serving temperatures when following the manufacturer's instructions.

Panasonic NN-SN67KS microwave - the center came out a bit warmer than the edges during our heat...
The center came out a bit warmer than the edges during our heat testing of the Panasonic NN-SN67KS.
Credit: Laura Casner

The frozen burrito was heated pretty evenly, with only an average of 7°F of a temperature difference between the left, right, and center regions of the burrito. This appliance did even better with the Hot Pocket, with our thermometers only reading an average difference of 3°F between the three regions.

Many microwaves struggled with the frozen lasagna, but this Panasonic was the best out of the group when heating this packaged meal. We calculated an average temperature discrepancy of 9°F between the 6 different zones, with the largest difference being 18°F between any one zone. There were a few areas that fell a little short of the requisite 165°F but we think just a bit longer in the microwave would have remedied that.

Panasonic NN-SN67KS microwave - around 2/3 of the ground turkey was fully defrosted.
Around 2/3 of the ground turkey was fully defrosted.
Credit: Laura Casner


Using a one pound block of frozen ground turkey, we defrosted it according to the microwave's defrosting instructions. We then scraped off the thawed meat and weighed what was left over to determine how much meat was still frozen. If any turkey was prematurely cooked, we docked points. Defrosting accounted for 20% of the final score.

Regrettably, we weren't thrilled with the Panasonic NN-SN67KS's performance when defrosting the frozen block of ground turkey. Around 2/3 of the block was defrosted, with the remainder staying very frozen. It also has some areas that seemed to be fully cooked, despite heeding its notification to flip the turkey over halfway through heating.

Panasonic NN-SN67KS microwave - the panasonic nn-sn67ks is larger and premium-priced, but it...
The Panasonic NN-SN67KS is larger and premium-priced, but it delivers exceptional heating and frozen food performance. It isn't very portable; it takes quite a lot of force to slide this microwave around even on slick countertops.
Credit: Laura Casner

Ease of Use

Ease of use made up the final 10% of each microwave's overall score. We assessed presets, function buttons, timers, and lighting, among other things. The Panasonic NN-SN67KS had an above-average showing here.

We appreciate how easy it is to use this product. It has a +30 seconds button, and it stayed put on the countertop, never sliding around when we hit a button or opened or closed the door. The presets also seem to be quite effective, with the popcorn button microwaving a bag of popcorn almost to completion without burning it and leaving only a few unpopped kernels.

Panasonic NN-SN67KS microwave - this microwave stayed put on our countertops without sliding around.
This microwave stayed put on our countertops without sliding around.
Credit: Laura Casner

Should You Buy the Panasonic NN-SN67KS

If you are looking for a microwave oven that can heat frozen foods better than any other, and deliver even heating across most food items, the Panasonic NN-SN67KS is an ideal purchase. It is a workhorse oven with a large capacity and is quite easy to use. While it is more expensive than most competing ovens, it makes up for that by delivering more even heating and better frozen food performance than any competing product.

What Other Products Should You Consider?

The Panasonic is one of the larger microwaves, and it may be too large for some kitchens. If so, then the Kenmore 70919 is a top-performing oven ideal for a smaller kitchen, and a bit less expensive too. It's nearly as good as the Panasonic when it comes to frozen foods, and offers better defrosting capability.

If your budget is tight, then consider the Amazon Basics Microwave 0.7. It is one of the most affordable products on the market, but it performed better than average across the board. It won't heat as impressively evenly as the Panasonic or heat up frozen foods as well, but it offers very good performance on both heating and frozen foods and is a good all-around product. For the price, it is hard to beat.

David Wise and Austin Palmer
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