What it is
Hot air moving fast strips away the still, moist layer that sits against food and slows heat transfer. Removing it means surfaces dry and brown much faster. A conventional fan oven does the same, gently, in a chamber ten times the volume.
An air fryer's advantage is entirely in scale and airflow: a small chamber preheats in two or three minutes rather than fifteen, and the fan changes the air many times a second. For small quantities of things that want a dry, browned surface, it is faster and better than an oven and uses far less energy.
It is not frying. There is no oil bath and none of the even, all-round heat transfer immersion provides. What it produces is very good roasting.
Choosing one
- Capacity
- The binding constraint. A 4-litre basket feeds one or two; 6 to 8 litres suits three or four. Quoted capacity is generous — usable single-layer area is what matters.
- Basket or oven style
- Basket models shake easily and are more compact. Oven-style models with racks hold more and let you see in, and are bulkier.
- Dual baskets
- Two zones with independent settings. Genuinely useful for a whole meal, and takes a lot of worktop.
- A visible window and a light
- Worth having. Otherwise you are opening it constantly.
- Dishwasher-safe basket
- Not optional in practice. Air fryer baskets get greasy.
- Noise
- They all whine. Some considerably more than others.
Using it well
- Single layer, with gaps. Crowding defeats the entire mechanism.
- Use a little oil. A teaspoon makes a large difference. "No oil needed" is technically true and produces dry, dull food.
- Shake or turn halfway. Airflow is not uniform.
- Reduce oven temperatures by about 20°C and check about 20% earlier.
- Preheat for two or three minutes for anything you want seared rather than dried.
- Clean it properly and often. Burnt-on fat smokes and taints everything.
What it is genuinely good at, and what it is not
- Reheating anything crisp
- Its single best use. Chips, roast potatoes, pizza, fried chicken and pastry all come back properly, which a microwave cannot do.
- Small quantities
- A single portion in eight minutes, without heating a whole oven. This is most of the appeal.
- Frozen prepared food
- Chips, breaded fish, spring rolls. Better than an oven and much faster.
- Roasting a small tray of vegetables
- Very good, provided you shake the basket and do not fill it.
- Not for
- Anything wet or batter-coated, which drips through; large joints; anything you want to brown evenly in quantity; and anything needing a pan sauce.
- Not actually frying
- It is a small convection oven with an aggressive fan. That is not a criticism — moving air is exactly what crisps things — but it does not fry.
Common questions
Is it worth buying?
If you cook for one or two, reheat crisp things often, or want to avoid heating an oven, yes. If you cook for four or more regularly, the capacity will frustrate you.
Does it replace an oven?
No. It replaces some oven trips.
Can I use foil or baking paper?
Usually yes, if weighed down by food — loose paper can fly into the element. Check your manufacturer's instructions.
Is air-fried food healthier?
It uses less oil than deep frying. FoodHQ does not publish health guidance beyond that observation.
Try this next
- Air frying the technique
- Roasting the sourced page on dry heat
- Potato the thing it is most used for