Air fryers have a size problem. Every dual-basket model promises twice the cooking, but side-by-side drawers eat up 40-plus centimetres of bench space — a dealbreaker in the apartments and small kitchens where air fryers live. Ninja’s answer is the DoubleStack XXXL 9.5L 2 Drawer Air Fryer: two 4.75L drawers stacked vertically instead of horizontally, delivering 9.5 litres of capacity in roughly the footprint of a single-basket fryer. (Naming note: it’s sold as the “DoubleStack XXXL” in Australia — the same product reviewed overseas as the “Double Stack XL”.)
Launched in Australia in October 2024, it’s now $499 at Ninja’s official Australian store — down from a $599.99 RRP — and $499 at JB Hi-Fi. Here’s whether the cleverest air fryer design of the decade is worth it, and how it stacks up against Ninja’s own rivals at Australian prices.
Quick verdict
The DoubleStack XXXL is genuinely brilliant if bench space is your constraint: 9.5L of dual-zone capacity, the ability to cook up to four foods at once with the included meal racks, and top-tier cooking results — all in a 28.6cm-wide tower that fits under standard cabinets. At $499 it’s expensive for a dual-basket air fryer, and it’s heavy (10.2kg) with a tall 38.5cm profile. If you have the counter space, cheaper Ninja models cook just as well. If you don’t, this is the best-engineered answer on the market — buy it when it’s on sale.
Ninja DoubleStack XXXL: Australian price and where to buy cheapest
Here’s the current price picture (checked 8 October 2026):
$499.99 — Ninja Kitchen AU (official store) — down from the $599.99 RRP, so you’re saving $100. Free shipping on orders over $100 and a 2-year warranty included.
$499 — JB Hi-Fi — the same deal, effectively, at Australia’s biggest electronics retailer.
$529.99 — Smart variant (SL451) at Ninja Kitchen AU — adds the Foodi Smart Probe thermometer for $30 more; worth it if you cook a lot of meat.
At launch the Australian list price was AU$479 (per TechRadar’s review), and it’s drifted up since — which makes sale timing matter. Ninja runs “Spend & Save” promotions regularly (recently $70 off over $500), and first-order discount codes have appeared on the official store. This is one to buy on a deal rather than at full price; it typically drops further during major sales events, so setting a price alert and waiting is the smart play. Confirm the price before checkout — street prices move.
Ninja DoubleStack XXXL: key features and specs
- Capacity: 9.5L total — two 4.75L drawers, feeds up to 8 people
- Cook 4 foods at once: includes 2 removable stainless-steel Stacked Meal Racks, splitting each drawer into two layers
- 6 cooking functions: Air Fry, Max Crisp, Roast, Bake, Reheat, Dehydrate
- Smart Finish: cook two different foods in two drawers so both finish at the same time
- Match Cook: copies settings across both drawers for full 9.5L batch cooking
- Power: 2270W
- Dimensions: 28.6cm wide × 48.8cm deep × 38.5cm tall; 10.2kg
- Cleaning: drawers and nonstick crisper plates are dishwasher-safe
- In the box: air fryer, 2 nonstick crisper plates, 2 stacked meal racks, recipe guide and cooking charts
- Colours: Black or White; 2-year warranty
The headline spec that matters isn’t the wattage — it’s the footprint. At 28.6cm wide, the DoubleStack is around 30% slimmer than a traditional side-by-side dual-drawer fryer, and it slides under standard kitchen cabinets. Ninja quotes energy savings of up to 55% versus a conventional oven, and up to 75% less fat versus deep frying — standard Ninja claims, but in line with how air fryers perform generally.
What makes the DoubleStack design different
Every dual-basket air fryer before this one laid its drawers out horizontally. The DoubleStack’s party trick is vertical stacking: drawer two sits on top of drawer one, with the control panel relocated to the side of the machine to free up every millimetre. The result is the capacity of a 9.5L family fryer in a column barely wider than a single-basket model — it fits two 2.3kg chickens or 2.3kg of wings per drawer, per Ninja.
The included meal racks are what elevate it from “two drawers” to “four cooking zones”. Slot a rack above the crisper plate and each drawer cooks two foods at different levels — chips on the rack, chicken below. There are honest trade-offs: with the heat sources sitting at the back of the drawers rather than above them, reviewers have noted food cooks slightly faster at the rear than the front, and there’s no shake/turn reminder — so you’ll want to shuffle larger batches manually. The perforated drawer backs also make it less suited to wet cooking like rice or stews (silicone liners fix this).
Then there’s the honest physical reality: at 10.2kg and nearly 39cm tall, it’s the heaviest air fryer in its class. This is a permanent benchtop resident, not something you’ll lift into a cupboard after dinner.
How it compares to Ninja’s rivals at Australian prices
Ninja sells a crowded air fryer lineup in Australia, and the DoubleStack isn’t obviously the best value. Here’s the field:
- Ninja Crispi Pro ($399 AU) — Ninja’s newer portable glass air fryer is $100 cheaper and arguably more innovative, with its glass-crisping design and detachable power pod. It’s smaller and aimed at singles and couples, though — the DoubleStack is the family machine. Our Ninja Crispi Pro Australian breakdown covers what’s new.
- Ninja Foodi Dual Zone AF300 7.6L ($249 at The Good Guys) — the classic side-by-side dual drawer, half the price of the DoubleStack, with the same Smart Finish and Match Cook logic. If your bench can take its 41.5cm width, it’s the value king of Ninja’s range.
- Ninja Foodi Max Dual Zone ($449.99 AU launch RRP) — the big conventional dual-drawer alternative. TechRadar’s head-to-head found the two close on price at launch, but the DoubleStack now typically sells dearer in Australia. The Max is wider; the DoubleStack is taller. Pick based on your cabinet clearance, not the badge.
And from other brands, at real Australian prices:
- Tefal Dual Easy Fry Flex 9L ($249 AU) — nearly the same 9L dual-zone territory for half the money, with a flexible GiantZone drawer that converts into one big compartment. It doesn’t stack, though. Our Tefal Dual Easy Fry Flex 9L Australian price breakdown has the details.
- Philips 5000 Series Steam Airfryer 7.2L ($349 AU) — the play here is steam: it adds moisture for juicier results and reheating that doesn’t dry food out. Smaller than the DoubleStack and no vertical stacking, but a different cooking philosophy at $150 less. Covered in our Philips 5000 Series Steam Airfryer Australian breakdown.
The pattern is clear: the DoubleStack charges a premium for the engineering of the vertical design. On pure cooking-for-money, the AF300 at $249 and the Tefal at $249 are unbeatable. The DoubleStack wins when those cheaper models literally don’t fit your kitchen.
Who should buy it
Buy the DoubleStack XXXL if: your kitchen bench is tight but you need real dual-zone capacity — the stacked design is genuinely unique and it cooks very well; you regularly cook for 4–8 people and want to run different foods in two drawers finishing at the same time; or you’ve been priced out of the Crispi-style novelty and want a proven workhorse.
Think twice if: you have 40cm+ of free bench width — the Ninja AF300 at $249 does the same dual-zone job for half the money; you need to cook wet dishes like rice or curries regularly (the perforated drawers aren’t ideal); you lift appliances in and out of cupboards (10.2kg says no); or the $499 price stings — wait for one of Ninja’s regular Spend & Save events.
Final verdict
The Ninja DoubleStack XXXL is the smartest dual-basket air fryer design you can buy in Australia — a 9.5L family machine in the footprint of a single-basket fryer, with genuinely useful Smart Finish and Match Cook features and cooking results that reviewers rate among the best they’ve tested. It isn’t cheap at $499, and its uneven rear-to-front heating and 10.2kg heft are real caveats. But nothing else solves the small-kitchen/big-family problem this elegantly. Buy the standard model on sale; take the $529.99 Smart variant only if you’ll actually use the probe. For most buyers, the honest answer is to measure your bench first — then decide.
Ninja DoubleStack XXXL: frequently asked questions
How much is the Ninja DoubleStack XXXL air fryer in Australia?
The Ninja DoubleStack XXXL 9.5L 2 Drawer Air Fryer is currently $499.99 at Ninja Kitchen AU (down from the $599.99 RRP) and $499 at JB Hi-Fi. At launch in October 2024 the Australian list price was $479. The Smart variant with the Foodi Smart Probe is $529.99.
What is the DoubleStack XXXL’s capacity and size?
It has a 9.5L total capacity split across two 4.75L drawers — enough to feed up to 8 people, with room for two 2.3kg chickens or 2.3kg of wings per drawer. It measures 28.6cm wide × 48.8cm deep × 38.5cm tall and weighs 10.2kg, so it’s slim but heavy.
Is the DoubleStack the same as the Double Stack XL?
Yes — “DoubleStack XXXL” is simply the Australian retail name for the same 9.5L stacked-drawer air fryer sold overseas as the Double Stack XL (model SL400). The specs, 6 cooking functions and included meal racks are identical.
DoubleStack XXXL vs Ninja AF300 — which should I buy?
The AF300 7.6L costs $249 — half the DoubleStack’s price — and cooks just as well with the same Smart Finish and Match Cook features. Buy the AF300 if you have the 40cm+ of bench width it needs. Buy the DoubleStack XXXL only if bench space is tight: its 28.6cm-wide stacked design is the one thing the cheaper models can’t match.
Is there a DoubleStack with a meat probe?
Yes — the DoubleStack XXXL Smart (SL451) includes Ninja’s Smart Cook System with an integrated Foodi Smart Probe for no-guesswork doneness. It sells for $529.99 at Ninja Kitchen AU, $30 more than the standard model.
