Ninja DoubleStack XL 10-Qt 2-Basket Air Fryer SL401

The Ninja DoubleStack XL SL401 launched in June 2024 as a space-saving reinvention of the dual-basket air fryer. Instead of placing two 5-quart baskets side by side, Ninja stacks them vertically, reducing the countertop footprint by approximately 40% while maintaining the full 10-quart total cooking capacity. Each basket operates independently with its own heating zone, and the Smart Finish feature automatically staggers start times so both baskets complete cooking simultaneously. The 1690-watt system supports six cooking functions across both zones: Air Fry, Air Broil, Roast, Bake, Reheat, and Dehydrate, reaching temperatures up to 450 degrees Fahrenheit. Cooking two entirely different foods at different temperatures and times is straightforward, and the Match Cook shortcut mirrors one basket settings to the other for identical batches. Both baskets and crisper plates are dishwasher-safe for low-friction cleanup. For households that want dual-zone cooking but are constrained by counter space, the SL401 is the most practical option on the market. The stacked configuration requires slightly more overhead clearance than side-by-side units, and some testers have noted minor cooking evenness differences between upper and lower basket levels, but overall it is a highly capable and uniquely space-efficient air fryer for families who need to cook multiple dishes at once.