Ninja Double Stack Review UK 2026
Quick verdict
Score: 8.0/10
Best for: Faster, lower-oil everyday cooking and reheating, cooking two foods at once
Not for: Large family roasts and big-batch cooking, where a full-size oven still wins on capacity
Bottom line: A practical air fryer (7.6L, dual zone, 6 functions) that crisps food fast with little oil and costs less to run than an oven.
The Ninja Double Stack SL300UK is a 7.6L dual zone air fryer that uses two separate drawers, allowing two foods to be cooked at the same time without mixing portions. The vertical dual-drawer setup suits households wanting faster meal prep and clear separation of flavours, while the stacked design can make loading slightly less convenient than flat baskets. The 6-portion capacity is practical for everyday meals, but larger batch cooking may require multiple runs. Overall, it may be considered one of the best This air fryer air fryers for buyers whose portion sizes align with the stated capacity.
Key specifications
| Spec | Value |
|---|---|
| Total capacity | 7.6L |
| Drawers | 2 |
| Racks | 2 |
| Cooking levels | 4 |
| Cooking functions | 6 |
Pros
- 7.6L capacity
- Dual zone - cook two foods at once
- 6 cooking functions
- Faster and cheaper to run than a full-size oven
Cons
- Takes up worktop space (dual-zone models are bulky)
- Cooks smaller batches than a full-size oven
- Some foods still need a light spray of oil to crisp up
Capacity and Size
A 7.6L total capacity, split across two separate drawers, defines the usable cooking space of the Ninja, and it is designed to support cooking different items at the same time without mixing. Each drawer is paired with its own rack setup, letting it hold multiple portions within the overall 7.6L limit. In practical use, this layout can accommodate meals for two to six portions, as the model is also described as offering 6 portions. The vertical, space-saving form factor is intended to keep the countertop footprint lower than many single large baskets.
Cooking Performance and Functions
With six cooking functions, the air fryer is designed for more than air frying, including roasting or crisping-style cooking. Its vertical dual-drawer layout helps keep portions separated so flavours do not mix. Each drawer can be loaded with different portions, and the unit's four cooking levels provide height options for food placement. Cooking results typically lean towards even crisping on the outside while keeping the inside more moist.
Single or Dual Zone
However, the Ninja is often described as a dual-zone cooker. It is a vertical dual-drawer air fryer with two separate drawers that can be loaded and operated side-by-side for different portions. The unit includes 2 drawers and 2 racks, plus a 7.6L capacity and space for 6 portions. Each drawer can be used for different foods, so timing can be coordinated within the same appliance. For large batches, the split space can feel limiting.
Ease of Use and Controls
The air fryer is designed for simple daily operation, using two separate drawers with controls that are intended to be easy to follow while cooking. Each drawer can run different cooking tasks at the same time, which supports flexible meal timing when you are cooking more than one component. Cooking is selected by choosing one of the unit's 6 functions, then setting a level from 4 available cooking levels. Operation is step-based: load the 2 drawers and 2 racks, choose the function and cooking level, then start the cook. The main drawback is that the two drawers require two separate loading routines, which can slow down multitasking for beginners.
Cleaning and Maintenance
Cleaning and maintenance are straightforward on the Ninja Double Stack SL300UK because it has two drawers that can be removed after cooking. Once the unit has cooled, the drawers can be taken out carefully to access the baskets and racks more easily. After removing them, any loose crumbs can be tipped away. The baskets and racks should be washed with warm soapy water, then wiped dry before reassembly. The outer surfaces can be wiped with a damp cloth, and spills around the drawer area should be cleaned immediately. Grease buildup may occur, so routine cleaning helps reduce odours.
Noise and Energy Use
Noise levels and energy use on the Ninja vary with operation and the specific food being prepared. Running both drawers at once can increase overall operating sound and power draw compared with using a single drawer, because two cooking zones heat simultaneously. Using different cooking levels also changes fan and heating demand, so preheating or higher settings may be louder. Light foods such as vegetables often finish sooner, while thicker items such as chips or coated proteins usually require longer cycles.
Who Is This Air Fryer For?
Who is the air fryer for? This air fryer is for people who want a vertical, space-saving design with a 7.6L capacity and who prefer cooking in two separate drawers at once. The dual-drawer layout suits busy households that want to cook two items simultaneously without mixing flavours. With 6 cooking functions and 4 cooking levels, it also suits cooks who like choosing between settings for different foods. It is less suitable for anyone only cooking very small single portions, as the dual-drawer setup is central to how it is used.
Where to Buy in the UK
Finding the Ninja in the UK is usually easiest through major electrical retailers and large online marketplaces, where it is listed as the "Ninja Double Stack SL300UK Fryer" (SL300UK). Shoppers should compare listings across sites, because stock and bundle contents can vary, and some sellers describe the same model with different wording. In-store availability may be limited, but customers can check regional branches, then reserve online if supported. Third-party sellers can also appear online, so it helps to confirm the model name as well as that the package includes 2 drawers and 2 racks, as these details align with the product title.
Frequently Asked Questions
Is this air fryer worth it?
For faster, lower-oil cooking of chips, chicken, veg and reheats, the Ninja earns its place with 7.6L capacity and two drawers so you can cook two things at once. It is also cheaper to run than heating a full-size oven - check the current Amazon UK price, as it changes often.
Is the Ninja Double Stack SL300UK big enough for a family?
The air fryer has 7.6L capacity, split across two drawers, so the usable space per drawer is smaller than the total suggests. As a rough guide, 4-5L suits 1-2 people, 6-8L suits 3-4, and larger or dual-drawer models suit families of 4 or more.
What are the downsides of this air fryer?
Air fryers take up worktop space (dual-zone models are bulky), cook smaller batches than a full oven, and some foods still need a light oil spray. They are best for crisping and reheating rather than replacing every oven job, which is why they suit some kitchens better than others.
Is the Ninja cheaper to run than an oven?
For small and medium portions, usually yes - the air fryer heats a much smaller space than a full-size oven and cooks faster, so it uses less energy. For large meals that fill a big oven anyway, the saving is smaller. Exact cost depends on its wattage and your tariff.
Can the Ninja cook two things at once?
Yes - the air fryer has two separate drawers, so you can cook two foods at different temperatures and times, and finish them together. It is ideal for a main and a side, though it takes up more worktop space than a single-drawer model.
What can you cook in the Ninja Double Stack SL300UK?
This air fryer has 6 cooking functions covering jobs like air-fry, roast, bake, grill and reheat. Beyond chips it handles chicken, fish, veg, bacon and reheating leftovers crisply; baking and dehydrating are possible on models that offer those modes.
Is the Ninja easy to clean?
The drawer and crisper plate wipe or wash clean; non-stick coatings make this easier. Clean it after each use, as baked-on grease is harder to remove later.
Do you need oil in the air fryer?
Little or none - the Ninja circulates hot air to crisp food, so most things need only a light spray of oil or none at all. Naturally fatty foods like sausages need no added oil, while a fine mist helps fresh chips and breaded items crisp up.