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Ninja DoubleStack XL Smart Air Fryer, 2-Basket, 10 QT, 6-in-1, DoubleStack Technology Cooks 4 Foods at Once, Space Saving Design, Air Fry, Broil, Bake SL451

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Availability: Only 2 left in stock, order soon!
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Arrives Friday, Aug 14
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Size: 10.0 Qt


Features

  • SPACE SAVING DESIGN: Ninjas stacked design lets you cook double the food in nearly half the space and still fits under standard cabinets. Plus, its 40% slimmer than your traditional 2-basket air fryers.
  • SMART COOK SYSTEM: Achieve the perfect doneness, from rare to well-done, at the touch of a button with the integrated Foodi Smart Thermometerno guesswork required.
  • DOUBLESTACK AIR FRYING TECHNOLOGY: Only Ninjas stacked design has 2 independently controlled baskets so you can cook 4 foods at once
  • COOK 4 FOODS WITH STACKED MEAL RACKS: Includes 2 removable stacked meal racks allowing you to cook on 2 levels per basket. Superheated air surrounds both foods in each basket for an all-around crisp.
  • SMART FINISH & MATCH COOK: Choose between the Smart Finish feature, which unlocks cooking 2 foods 2 ways that finish at the same time, and the Match Cook feature, which easily copies settings across zones for full 10-qt. capacity meals.
  • XL FAMILY-SIZED CAPACITY: 10 QT capacity lets you cook two, 5-lb chickens at once and can feed up to 8 people.
  • 6-IN-1 FUNCTIONALITY: Includes 6 versatile cooking programs: Air Fry, Air Broil, Roast, Bake, Reheat, and Dehydrate.
  • LESS FAT: Up to 75% less fat than traditional air frying methods. Tested against hand-cut, deep-fried French fries.
  • EASY CLEANING: Easy-to-clean baskets and dishwasher-safe crisper plates.
  • WHAT'S INCLUDED: DoubleStack Air Fryer, (2) 5 Quart Baskets, (2) Nonstick Crisper Plates, (2) Stacked Meal Racks, Ninja Foodi Smart Thermometer, 9 Recipes, Additional Meal Options & Cooking Charts.

Description

Meet the Ninja DoubleStack XL Smart 2-Basket Air Fryer, the only stacked 2-basket air fryer that can cook up to 4 foods at once. Designed for efficiency, versatility, and easier family-sized meals, Ninja’s stacked 10-QT design maximizes counter space while giving you the power and capacity of 2 air fryers in the footprint of 1. Only Ninja has DoubleStack Air Frying technology that delivers the optimal air flow and even heat required to cook 4 foods at once for crispy, golden perfection every time. Also included is Ninja’s Smart Cook System. Ninja's Smart Cook System allows you to achieve the perfect doneness at the touch of a button with the integrated Foodi Smart Thermometer—no guesswork required. Simply load your veggies onto the crisper plate, insert the stacked meal rack into the basket, and place your proteins on top to cook 2 different foods in one basket. Two 5-QT baskets allow you to simultaneously prepare different dishes, making multi-tasking in the kitchen a breeze. Cook more food in a smaller footprint—easily fits two 5-lb chickens or 5 lbs of wings in each drawer. Perfect for smaller kitchens, enjoy delicious homemade meals while keeping your countertops clear of clutter. vs NINJA AF080 (power) and CHEFMAN 5QT Air Fryer

Special Feature: Automatic Shut-Off, Dual Zone Features, Programmable, Temperature Control


Product Dimensions: 11.25"D x 19.22"W x 15.14"H


Color: Deep Gray 004


Capacity: 10 Quarts


Material: Plastic


Special Features: Automatic Shut-Off, Dual Zone Features, Programmable, Temperature Control


Output Wattage: 1690 Watts


Wattage: 1690 watts


Voltage: 120 Volts


Control Method: Touch


Min Temperature Setting: 80 Degrees Celsius


Max Temperature Setting: 200 Degrees Celsius


Item Dimensions D x W x H: 11.25"D x 19.22"W x 15.14"H


Capacity: 10 Quarts


Size: 10.0 Qt


Material: Plastic


Has Nonstick Coating: Yes


Outer Material: Plastic


Is the item dishwasher safe?: Yes


Inner Material: Plastic


Recommended Uses For Product: Bake, Broil, Dehydrate, Reheat, Roast


Brand Name: Ninja


Model Name: Ninja SL451


Model Number: SL451


Manufacture Year: 2022


UPC: 622356631228


Configuration: 2 baskets, stackable


Manufacturer: SharkNinja


Part Number: SL451


Item Type Name: DoubleStack XL Smart 2-Basket Air Fryer, Smart Cook System, DoubleStack Technology Cook 4 Foods at Once, Space Saving Design, 10 QT, 6-in-1, Smart Finish & Match Cook, Air Fry, Broil, Bake


Included Components: (2) 5 Quart Baskets, (2) Nonstick Crisper Plates, (2) Stacked Meal Racks, DoubleStack Air Fryer, Ninja Foodi Smart Thermometer


Unit Count: 10 Count


Color: Deep Gray 004


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Aug 14

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Best tool!
Size: 10.0 Qt
This Ninja DoubleStack XL Air Fryer is hands down one of the best kitchen tools I’ve ever purchased. The dual-basket design is a game changer—I can cook two different foods at the same time without mixing flavors, which saves so much time. The 10 QT capacity is perfect for family meals, and everything cooks evenly and comes out crispy every time. I’ve used it for everything from chicken and fries to veggies, and it hasn’t disappointed. The controls are easy to use, and the different cooking functions make it super versatile. Cleanup is also quick and simple, which is a huge plus. Overall: If you’re thinking about getting an air fryer, this is the one. It’s powerful, convenient, and absolutely worth it!The Ninja DoubleStack XL Air Fryer is undoubtedly one of the best kitchen appliances I’ve ever purchased. The dual-basket design is a game changer; I can cook two different foods at the same time without mixing flavors, which saves a lot of time. With its 10-quart capacity, it's perfect for family meals, and everything cooks evenly and comes out crispy every time. I’ve used it for everything from chicken and fries to vegetables, and it hasn’t disappointed. The controls are user-friendly, and the various cooking functions make it extremely versatile. Cleanup is also quick and simple, which is a significant advantage. Overall, if you’re considering getting an air fryer, this is the one to choose. It’s powerful, convenient, and absolutely worth it! ... show more
Reviewed in the United States on March 24, 2026 by LucyG

  • This is the one you want. More expensive but this is QUALITY
Size: 10.0 Qt
This is what better than I even thought it would be. I love how it didn't have a preheat mode that takes forever like my last one. It's much more quiet than my last air fryer. It does a better job at circulating air than my last one. It gets s very even cook and I just turn the food 1-2 times. I didn't even know it had a temp probe on it. I reheated an entire rotisserie chicken on the bottom and reheated Mac and cheese on the top. The dual compartments are a game changer. The buttons are intuitive and easy to use. I love this this so much. Ninja is the best there is in my opinion. ... show more
Reviewed in the United States on June 3, 2026 by Samantha Parks

  • Best Appliance EVER!!! Best Appliance EVER!!!
Size: 10 QT
Best kitchen appliance ever!!!!! I use this so often I have allowed it to stay on my counter. It is designed well and takes up only a small amount of real estate on the counter. I can reheat or cook a full meal. The only drawback is steak does not cook well in the air fryer but I have never had a good steak out of any brand of air fryer. Everything else chicken or fish cooks perfectly. I find that I don’t use the racks all that often but they are nice for popping in veggies last minute so they are not soggy. It was worth every penny spent. ... show more
Reviewed in the United States on February 22, 2026 Reviewed in the United States on February 22, 2026 by C. Yanez

  • Game-Changer for Busy Families and Meal Preppers! Game-Changer for Busy Families and Meal Preppers!
Size: 10 QT
We were sad when our last Ninja Multi-Cooker malfunctioned, but this air fryer is a wonderful replacement. With the dual baskets, I can knock out reheating fries and frying wings at the same time. No juggling trays or waiting for batches. It’s built solid, heats fast, and cooks evenly every single time. The capacity is a lifesaver for family meals or Sunday prep. The controls are intuitive, cleanup is easy, and it feels like a professional-grade appliance designed for real-world households. The vertical build frees up countertop space compared to our previous air fryer. If you value time, precision, and performance, this is it. Rugged, reliable, and surprisingly sleek—it’s the kind of kitchen gear that earns counter space. ... show more
Reviewed in the United States on November 10, 2025 Reviewed in the United States on November 10, 2025 by Rjnor1980

  • Great for apartments!
Size: 8 QT
This air fryer is perfect if you live in an apartment with limited counter space, or you just like how it’s stacked! After months of use, it cooks evenly and has no issues with temperature or functionality. The cooking options are simple and straightforward, it is one of the best purchases we made when moving. It is decently easy to clean and automatically starts to cool itself down after it finishes cooking. It comes with a metal rack that helps separate the food and ensures a more even cook. We use this air fryer 2-3x a week, if not more, and love it. ... show more
Reviewed in the United States on March 12, 2026 by Rheanna

  • Great, but beware of food safety with smart finish.
Size: 10.0 Qt
4 stars because the smart finish only works if the food pairs well. For example, frozen tater tots are about 25 minutes. Raw hamburgers are about 10 minutes. There is a 15 minute period where there is risk for bacterial growth. I tried this and the Instant Pot 10QT Air Fryer. I will be keeping this one. It is much skinnier but not much taller than the Instant Pot. The dual cooking zones are great, so no back to back cooking. It is louder than the Instant Pot, but not terrible. I will be keeping this one. ... show more
Reviewed in the United States on June 6, 2026 by hillman

  • Spacious, Easy-to-Clean Air Fryer with Innovative Double Stack Design
Size: 10 QT
The Ninja SL401 Double Stack Air Fryer has been a practical addition to my kitchen. The double-stack design is very spacious, allowing me to cook more food at once, and the included rack is a thoughtful feature for dividing each basket—perfect for items like fries. I did notice that food on the rack tends to come out slightly crispier than food on the bottom plate, which works well for different textures. Cleaning is straightforward, as the racks and baskets are removable and easy to wash. The Smart Finish feature ensures that both the top and bottom baskets finish cooking at the same time, making it easy to serve multiple types of food together. This feature has resolved the issue of staggered meals I faced with my previous air fryer. While it’s not the smallest appliance, the stacked design saves counter space compared to side-by-side models and fits neatly between the countertop and cabinets. Overall, it’s a well-designed and functional air fryer for families. ... show more
Reviewed in the United States on January 26, 2025 by Carlos

  • We use it for every meal
Size: 10.0 Qt
We use this every day. I have had it for about six months now and it is a cornerstone in our kitchen. It is easy to use and easy to clean. It cooks evenly and consistently. Definitely buy liners to make clean up even easier.
Reviewed in the United States on April 25, 2026 by Amazon Customer

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