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🔥 Cook smarter, not harder — double the meals, half the wait! 🍴
The Ninja Double Stack XL 9.5L Air Fryer is a premium, space-saving kitchen powerhouse featuring dual drawers and 4 cooking levels. It offers 6 versatile cooking functions, cooks up to 55% faster and more energy-efficiently than traditional ovens, and serves up to 8 portions. Designed for busy professionals and families, it combines high capacity with smart technology and easy cleanup, making it the ultimate multitasking appliance for modern kitchens.

| Air Frying Technology | Rapid Air Circulation |
| Asin | B0CXTPK12L |
| Best Sellers Rank | 2,323 in Home & Kitchen (See Top 100 in Home & Kitchen) 6 in Air Fryers |
| Brand Name | Ninja |
| Capacity | 9.5 litres |
| Colour | Grey |
| Control Method | Touch |
| Controller Type | Hand Control |
| Country Of Origin | China |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,769) 4.6 out of 5 stars |
| Has Nonstick Coating | Yes |
| Inner Material | Aluminum Plastic |
| Is The Item Dishwasher Safe | Yes |
| Item Dimensions D X W X H | 47D x 28W x 38.5H centimetres |
| Item Highlight | 4 cooking levels (2 Drawers and 2 Racks), Space Saving Design, Make up to 8 portions, SL400UK |
| Item Type Name | Ninja Double Stack Air Fryer |
| Item Weight | 10.3 Kilograms |
| Manufacture Year | 2024 |
| Manufacturer | Ninja |
| Material | Aluminium, Plastic |
| Maximum Temperature Setting | 190 Degrees Celsius |
| Min Temperature Setting | 80 Degrees Celsius |
| Model Name | Ninja Double Stack XL |
| Model Number | SL400UK |
| Number Of Items | 1 |
| Outer Material | Either 'Plastic' or 'Aluminium' |
| Output Wattage | 1500 Watts |
| Part Number | SL400UK |
| Recommended Uses For Product | Max Crisp, Air Fry, Roast, Reheat, Dehydrate, Bake |
| Size | 9.5L |
| Software Update Supported To Date | unknown |
| Special Features | 6 Cooking Functions, Air Fry, Max Crisp, Roast, Bake, Reheat & Dehydrate, 2 independent cooking zones, 2 racks, Dishwasher Safe Parts |
| Upc | 622356280815 |
| Voltage | 240 Volts |
| Wattage | 2470 watts |
User
⭐⭐⭐⭐⭐ An incredible upgrade – the perfect air fryer for my kitchen!
After four years of daily use, my Ninja Foodi MAX Dual Zone Air Fryer with Smart Cook System (AF451UK) had been absolutely fantastic and never let me down, but I decided it was time for an upgrade. The Ninja Double Stack Pro XL in Stone Gold is everything I was hoping for and more. The clever vertical design gives me all the cooking capacity I need while taking up much less space on my worktop, making my kitchen feel far less cluttered. The Stone Gold finish is gorgeous and matches my home aesthetic perfectly, giving it a premium look that blends beautifully with my other appliances. Performance is exactly what I’ve come to expect from Ninja—fast, even cooking, crispy results, intuitive controls, and easy cleaning. If you’re considering upgrading from an older Ninja model, I can wholeheartedly recommend the Double Stack Pro XL; it keeps everything I loved about my previous air fryer while improving the design, saving valuable counter space, and looking absolutely stunning.
User
Space and energy saving air fryer
Love this air fryer. It’s stacked so takes up less room in my small kitchen. The quality is excellent and it’s so easy to use. Very versatile with Sync and Matching options. It takes less time to cook food than a conventional oven and is very much easier to clean! I especially like the way it cooks pastry 💕.
User
Finally a good air fryer !
For years, I used to think that air fryers were useless. Until this Ninja one. We've bought it about a month ago, and my partner and myself are both 100% convinced. Even frozen food (such as nuggets or fries when you don't have time to cook) is crispy after leaving the drawer.This Ninja is so easy to use, doesn't take much space compared to a horizontal air fryer and the food requires less time to cook when we prepare a meal from scratch (at least, we've had to decrease the time on our end as our previous air fryer was definitely not as good).I would 100% recommend it !!!
User
Ninja - Quality Cook
After having an Instant Vortex air fryer that was very good, I wanted a double stack, unfortunately Instant didn't do one, so I researched and decided to buy the Ninja SL300UK. I'm pleased I chose this model, its a great compact double stack air fryer, so far I cannot fault it, The air fryer function is good and so is the roast function. im very pleased with my purchase, its great, very easy to use, time takes a little longer than and its easy to clean. I would recommend the Ninja SL300, my only criticism is the cost of Ninja air fryers. There are better build quality air fryers out there with metal handles but the question is do they cook food as well as the Ninja, probably not, this is why NINJA are a safe choice, you know the cooking experience is excellent.
User
Read before buying
My old air fryer was perfectly fine. It cooked food, took up half the kitchen and generally got on with its life without causing any drama.Then the Ninja Double Stack arrived and immediately made it feel like I’d been cooking with Victorian technology.The first thing you notice is the design. Instead of spreading itself across the worktop like a stranded whale, it goes upwards. Whoever came up with the idea deserves some sort of national award because it somehow gives you two large cooking drawers without sacrificing half your kitchen counter space.It looks properly smart too. Sleek, modern and expensive enough that visitors assume you’ve got your life together. Little do they know you’re using it to cook dinosaur-shaped chicken nuggets and reheated pizza.The capacity is ridiculous. This thing can produce enough food for a family meal while occupying roughly the same footprint as a standard air fryer. It’s basically the TARDIS of kitchen appliances.The dual drawers are brilliant because it allows you to cook different foods at different temperatures and timings. No more trying to coordinate chips, chicken and vegetables like you’re directing air traffic control. Just throw everything in, press a few buttons and let the Ninja perform its dark arts.And somehow everything comes out crispy.I genuinely don’t understand how air fryers continue to get away with this. Chips? Crispy. Chicken? Crispy. Leftover pizza? Somehow crispier than it was when it arrived. At this point I’m fairly certain there’s a tiny wizard trapped inside.The sync function is probably my favourite feature. You can have two completely different meals cooking and the machine magically works out how to finish them at the same time. It’s like having Gordon Ramsay hidden in a drawer shouting timing instructions.The controls are easy enough to use, although like every modern appliance there are enough cooking modes to make you briefly question whether you’re operating kitchen equipment or preparing a spacecraft for launch.Cleaning is also surprisingly painless. The drawers slide out easily, the non-stick coating works well and most of the mess wipes away without requiring the strength and determination of a forensic investigator.The only downside is what happens after you buy it.You become one of those people.You start conversations with:“Have you tried it in the air fryer?”Someone mentions cooking literally anything and suddenly you’re giving a TED Talk about airflow circulation and crisping technology. Before long you’re convincing friends and family that buying a conventional oven was a mistake.You also start looking around the kitchen wondering if everything can go in it.Toast.Croissants.Wraps.Yesterday’s chips.Possibly small household furniture.Overall, the Ninja Double Stack is genuinely excellent. It saves space, cooks brilliantly, is easy to use and somehow makes weeknight dinners feel effortless.Expensive? Yes.Worth it?Let’s just say my actual oven now spends most of its time sitting in the corner wondering where it all went wrong.
User
Godsend
This has proved to be a godsend for us, my wife is a vegetarian and I am not, in the past we have struggled with meals as they invariably cook at different times/temperatures. With this brilliant device we can set our meals up in their own compartments, set the individual times and temperatures, sync it all and as if by magic both meals perfectly cooked are ready at exactly the same time. Brilliant cant recommended it highly enough.
User
Very spacious, well built, and genuinely useful for cooking multiple dishes
I bought the Ninja Double Stack XL Air Fryer as a Christmas present for my mother, and it ended up being used heavily over the Christmas period, including for Christmas dinner itself.Build quality is excellent. It feels solid, well finished, and like a premium appliance rather than something flimsy or gimmicky. The vertical dual-drawer design works really well and saves counter space while still offering a lot of capacity.Space is a big highlight. It comfortably handled cooking multiple items at once, which was especially useful when preparing a large meal. Being able to run different settings in each drawer makes it far more flexible than a single-basket air fryer.The controls and presets are clear and easy to use, even for someone who isn’t particularly technical. Everything heats evenly, and results were consistently good across different foods.Overall, a high-quality, very practical air fryer that’s ideal for larger households or anyone who wants to cook more than one thing at a time. My mother loves it, and after seeing it used properly, it feels like a worthwhile upgrade over smaller models.
User
Oven is redundant.
Love this thing. I had the double side by side before, and I much prefer this. Takes up less space also, it blows hot air to the side rather than out the back, unlike the traditional side-by-side Ninja air fryers. So while you have to be mindful of things next to it, it's not melting your plug socket like the side-by-side ones.
User
The look
The gold has already come off the logoVery unhappy with this product
User
The best airfryer
Great airfryer, high quality and doesn’t take up much worktop space in the kitchen
Trustpilot
1 month ago
1 month ago