Ninja Double Stack™ XL Countertop Oven & Air Fryer

This took a bit to get the hand of using. There are a lot of buttons and options it learn. The included manual is helpful and has all of the information you need, you just have to actually read it.

I like that you can open the top oven while the bottom remains cooking allowing you to leave bottom oven items undisturbed. Unfortunately you cannot open the bottom while the top remains closed.
It seems like it takes a bit longer then it should for some items to cook.
Although,we cooked a package of cinnamon rolls in 8 minutes, which is great for last minute snacks or breakfast. Haven’t got around to using the temp probe, that’s next on our list.

I wanted to love this air fryer toaster oven, but two major issues have significantly impacted my experience. Here’s an honest breakdown of the concerns:

1. Noise Level: Convection Fan Issues

When using the whole roast function, the noise level was shockingly high. The convection fan sounds like a tractor, making it impossible to ignore in my apartment. What’s worse, the housing and door resonate with the fan, creating an annoying rumble. I found that touching or holding the unit temporarily reduced the low-frequency noise, but the high-pitched sound persisted. I’m unsure if this is a defect in my unit or a design flaw, but it’s incredibly frustrating.

2. Surface Gets Dangerously Hot

The exterior surface becomes alarmingly hot during operation:

The upper door frame (just below the handle) measured 125°C (257°F).
The front edge of the housing reached 90°C (194°F).
These areas are easy to touch accidentally, posing a serious burn risk. For a countertop appliance, this level of heat on accessible surfaces is unacceptable and potentially dangerous.

3. Clearance and Stability Concerns

The clearance between the unit and my kitchen cabinet was only 5 inches, which feels far too close and raises concerns about a potential fire hazard.
Additionally, when opening the door, the oven slipped on my quartz countertop—and my countertop wasn’t greasy or wet. If there’s hot food inside, this could be a major safety risk.

While the oven offers a lot of cooking features, these safety and usability concerns make it hard to recommend without reservations. I hope the manufacturer addresses these issues, as they seriously affect both the convenience and safety of the product.

If noise and heat aren’t deal-breakers for you, this oven might still be worth considering for its functionality. For me, however, these drawbacks outweigh the benefits.

I’ve been using the Ninja Double Stack XL Countertop Oven & Air Fryer for a few days now, and so far I am impressed by what I have seen so far. The dual-level cooking system is truly amazing and a time saver, allowing me to prepare multiple dishes at once without having to juggle between different appliances. For instance, I can air fry chicken wings on one level while baking potatoes on the other, saving both time and effort.

The Pro Cook System is incredibly reliable, taking the guesswork out of cooking and ensuring perfectly cooked meals every time. Whether I’m air frying, baking, roasting, or grilling, the results are consistently exceptional. The food comes out crispy, juicy, and full of flavor.

One of my favorite features is its user-friendliness. The controls are intuitive and easy to use, even for those with little cooking experience. The dual oven also comes with a magnetically attachable temperature probe, so its always there. The flexdoor feature creates two independent ovens, so you can access just the top oven for quick snacks and meals, or open the full door to use both ovens. Additionally, its sleek design and modern aesthetic make it a stylish addition to any kitchen.

If you’re in the market for a powerful, multifunctional appliance that can handle a variety of cooking tasks, I highly recommend the Ninja Double Stack XL. It’s a fantastic investment for anyone looking to make meal prep easier, faster and more enjoyable.

Needing a bigger toaster oven, I ordered this unit. The oven arrived in its signature box. The stainless steel double stack xl countertop oven and air fryer weights about 31 pounds with dimensions a little over 18″D x 16″W x 13″H. The oven accessories included are two sheet pans, two wire racks, ONE crumb tray, air fryer basket, and meat probe. A detailed owner’s guide and instructions, along with recipes. This oven can bake, broil, reheat, keep warm, toast, bagel air fry, convection bake, pizza, air roast, whole roast, and dehydrate.
After washing and drying all accessories, I used the instructions to bake and air fry at 450 degrees both top and bottom with all accessories inside for 25 minutes to remove odor and packaging residue. While this was taking place, I went to YouTube as instructed and watch a few videos to make sure I was operating correctly. The guides included are adequate but I like visual as well.
It’ll take practice to get accustomed to all the operations, but so far is fairly easy to follow. The posted picture of the toast was a level 5.
There are some downsides for me in the use of this oven. The main problem is my cabinet position which is only a couple inches from the top of the unit. This wouldn’t be a problem necessarily if the top oven was not vented so much. I can actually look down into the unit from the gap at the top where the oven shuts. To me, this is like cooking with the oven propped open. There was way too much heat and smoke coming out from this area to be safely used under my cabinet. So, I’ll have to position differently to use.
Many aspects I really like are the easily manipulated and lighted selections, easy read outs, and a big plus is the automatic shut off. A very cool feature is that two meals can be synced in both ovens. There is a light inside for viewing.
Others aspects that I don’t like are a personal preference. I would prefer that the bottom part of the oven could be opened without opening the top as well (the top does open on its own). When opening the box, there is immediate advertisement to purchase a nonstick air fryer basket; why not have this type included instead of the cheap one provided. Why not give two crumb trays instead of one since two is ideal in dual use. This unit is only about 1/2″ wider from my older unit which was disappointing since I wanted to use some of my larger pans. Another negative is that all the included accessories should be hand washed. Also, not advised to use my two favorite cooking mediums of olive oil and butter due to smoking.
This is my first Ninja appliance, so time will tell if I can get past my dislikes.

This thing works like a charm and cooked my whole roasted chicken to perfection. Cant wait to see what else I can make.

It’s complicated, but once you learn it, it makes sense!

Maybe it was just me, but this unit felt like there were a ton of rules you had to know before using it. It made the entire experience feel convoluted at first, but I think I was making mountains out of mole hills. Because once I got it all figured out, it is actually quite intuitive. One example: nothing is dishwasher safe minus the wire rack, everything else has to be hand washed. So the rule in our family is NOTHING goes in the dishwasher in regards to this Ninja. The top oven can only be used for some things, and the sheet pan can rest on top of the wire rack, but on the bottom oven has two slots, some things go into one slot while others do not. The combination of the two can be tricky as well. But the rule of thumb is the top is a toaster, the bottom is an airfryer. This little distinction made it far more simple. The other thing is you can’t use low smoke point oils, such as olive oil or butter. So most if not all of your meals needs veggie oil, canola, etc. Also when using both ovens at the same time, you have to estimate additional time, Ninja recommends a couple minutes or so additional cook time. So if your recipe requires 20 mins to cook, try 22 instead.

The other complication was I bought a whole chicken, but it ended up being too big for the unit. Turns out the unit can only accept 5 pound chickens or lower with another page in the manual recommending 4 to 4.5 pounds. Needless to say, I had to use my conventional oven for the chicken instead of the Ninja. But that didn’t stop me, I also bought a salmon and that cooked gloriously! More on that later.

Once I got it figured out, the buttons on the front are pretty self explanatory. There is a “Top” and “Bottom” button, which just lets you the user know what is happening on the display for that particular space. Or turns on the unit enabling that particular spot. The “Smart Finish” button is a little tricky, but it has a couple features in that one button.

You can use the built in meat thermometer to have it stop cooking when it reaches the desired temp! Remember when I mentioned my super delicious salmon? Well I used the leave-in auto detect feature and it stopped cooking as soon as the temp got perfect! So good! I loved it. At the same time, I had potatoes and veggies roasting on the top! The family loved it and it was super easy to do. The other thing I noticed is the veggies didn’t taste like fish, so I think Ninja did a good job with aroma control.

The biggest thing I don’t like about this unit is the toaster! The settings variations on toast is not real, I had it set to 3 and 2 pieces of bread and my toast was essentially burnt! I turned it to 1 and 1, and both my pieces were fine.

But if you want a lightly toasted piece of bread, it’s impossible to do without watching the bread. For example my toddler likes very lightly warmed poptarts, and I can’t do that with this unit using the toast setting. I can however work around the issue using the “Keep Warm” setting.

So far I’ve made chicken tenders, chicken breast, salmon, veggies, nachos, fries, poptarts, toast, bagels, and mozzarella sticks. I plan on making so much more with this thing, including another attempt at a whole chicken.

All in all, I love this and I’m so happy to have it added into our kitchen!

So i bought this as a replacement for my Cuisinart one that is getting old, i already bought it about 5 years ago. The new one is by far more powerful and comes with a large variety of new options. One thing i do not like about this product however is the noise. It makes about as much noise as the microwave does when its being used. I dont think this would bother me but the old one was almost silent so the noise caught me off guard. Otherwise its a great product and highly recommended.

Introduction
Ninja is well known for making a wide variety of small appliances. Ninja is now jumping into the small oven category.
Going in
I have a good number of Ninja small appliances, so I was looking forward to see what innovation they included into this oven to make it stand out.
What comes in the box?
Out of the box you get the main oven, 2 base pans, 2 grill tops, a crumb tray, a meat thermometer, and a inserts (Recipe guide)
Minor wins
I do really like the utility of having two separate ovens in one that have their own separate temperature cook rate.
Major wins
Usage
The overall build quality of the oven is quite nice. It’s also surprisingly light.
Setting it up is super simple. You plug it in and add the crumb tray, the base pan, and or the grill top.
You have a lot of options to choose from on either floors of the oven. The top oven is a toaster oven, and is for quick cook options, and the bottom is an air fryer, for longer food items. I think that’s why you have the option of opening just the top so you can quickly remove and add more items.
You can choose the presets and go from there. You also have the option of using the manual meat thermometer to cook your meat to the proper temperature without too much worry.
I am absolutely shocked that there isn’t an app to use with the oven. I thought everything came with an app these days. I say that sarcastically, but I think in this case, an app would have made a lot of sense. The app can let you see how much time is left, but most importantly, you can see what the temp on the meat thermometer is just in case you want to undercook something to baste and continue.
I used it to make a batch of fries on the bottom, and reheated some fried chicken on top. Both came out crispy and no oil was used whatsoever.
Clean up is easy. Simply clean the pan or the tray and that’s it.
I do like the light that dims on and dims off.
I do wish this oven was a little larger.
Minor issues
The meat thermometer port has this little silicone plug that is attached to the unit and the other side plugs into the port. I’m guessing it’s for dust protection. My gripe is that the plug doesn’t go into the port completely. In fact, it just dangles there. Like I said, it’s a minor gripe.
Another minor issue is that both doors can’t be opened independently. You can open the top door by itself by pressing the button. You cannot however do the same for the lower half. I think it would have been nice to have a push button that releases a lock on the lower half.
Major issues
The control panel is straight forward, but flawed. I have many appliances that have touch panels, so to see a turn knob on a modern appliance is disappointing. You have to turn the knob to choose the cook category, and then press temp/shade and then turn the knob again, and the same for times, and the manual temp option. It’s just odd seeing a lack of a touch panel on an appliance in 2024. I would think it may cost the manufacturer a little more to add it on. Maybe on the next version?
Primarily for
People who either have space in their kitchen and want the utility of having two mini ovens, or people who just want the comfort of having an extra oven.
Probably not for
People who have very limited space on their counter space already.
All in all
It’s a great little oven. It has its flaws, but in terms of overall usability and functionality, it’s great.

The top section does not allow Air-Frying. This is unfortunate and not what I expected. I often air-fry chicken nuggets or tatter-tots, while desiring to Bake or Broil bigger dishes at the same time. I cannot because air-fry is only available in the lower section, which is bigger. The dishes that I would rather Bake or Broil are often too tall to fit in the upper section.

The machine has a beautiful asthetic look, however, this will not fit standard sized 13 by 9 baking sheets. So, you pretty much can only use the baking sheets supplied in the box. They are cheaply made and probably made with PFOAs and/or PTFEs.