How Does an Air Fryer Work?
Published by the RecipeAirFryer editorial team · How we source times · Updated
Times and temperatures come from our reviewed cooking database. Explanatory text on each page is generated from that entry so the numbers stay consistent.
An air fryer is a small fan oven: a heating element and a fan blow hot air across the food, which browns the surface faster than a full-size oven.
Quick answer
- 1A heating element warms the air inside a small chamber.
- 2A fan pushes that air across the food, stripping surface moisture so it browns.
- 3Because the chamber is small, it reaches temperature in about 2-3 minutes.
- 4Drop an oven recipe by 20°C / 25°F and about 20% of the time, then check early.
What an air fryer actually is
It is not a fryer in the deep-fat sense. There is no pot of oil. The basket or tray sits under a fan and a heating element, and the moving air does the crisping that oil would do in a deep fryer.
That is why a teaspoon of oil is enough for potatoes and vegetables, and why fatty foods such as bacon and chicken thighs need none.
The conversion rule
Treat it as an oven that runs hot and fast. Lower the temperature by 20°C / 25°F and cut the time by about 20%. The full chart is on the air fryer conversion page.
Thin food finishes even sooner. A dense joint still has to heat through to the middle, so go by internal temperature rather than the clock.
What fails in an air fryer
Wet batter drips through the basket and bakes onto the element. A large tray of food cannot brown evenly because the chamber is small and the pieces in the middle steam.
Loose paper, parchment with nothing on it, and anything liquid belong in a different appliance. Anything you want crisp, in portions of one to four, is what this machine is for.
Frequently Asked Questions
How does an air fryer work?+
A fan circulates air from a heating element over the food. The fast airflow dries and browns the surface, which is why it crisps with little or no oil and heats up in 2-3 minutes.
What is an air fryer?+
A small fan oven with a basket or tray. It cooks faster than a full oven because there is less air to heat, and it crisps better because the fan strips moisture off the surface.
How do you convert an oven recipe for an air fryer?+
Lower the temperature by 20°C / 25°F and cut the time by about 20%, then check early. Wet batter and very large trays do not convert well.