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Potatoes

Potato

Starch, water and surface area — the food that shows most clearly what air frying actually does.

What it does in fast-moving hot air

A potato is mostly water held in a starch matrix. Heat gelatinises the starch and drives water out of the surface layer; when that dehydrated layer is thin, dry and hot enough it becomes crisp. The whole game is getting water away from the surface faster than it arrives from inside, which is why crowding a basket produces soggy chips — the escaping steam has nowhere to go and condenses back onto the food. Sugar content decides browning speed, which is why some potatoes darken far faster than others at the same setting.

Why the cut matters

Almost everything an air fryer is good at can be demonstrated on a potato. The same tuber becomes chips, wedges, roast potatoes or a jacket depending on how it is cut, and each of those is a genuinely different cooking problem with a different failure mode.

Cooking pages

  • Frozen chips — The single most cooked food in this appliance class, and the one crowding ruins.
  • Roast potatoes — Parboiling is not optional, and it is what the air fryer cannot do for you.
  • Potato wedges — Thicker than chips, so the inside has to cook while the outside is already crisping.
  • Jacket potato — The longest cook in this catalogue, and the one where an air fryer beats an oven on time and energy.
  • Homemade chips — Twenty-five to forty minutes depending on who you ask, and the widest published disagreement in the catalogue.
  • Baby potatoes — 680g whole at 200°C for fifteen minutes — the quickest whole-potato option.
  • Frozen chunky chips — Charted twenty degrees COOLER than thin frozen fries, which surprises everybody.
  • Chunky homemade chips — Twenty to twenty-four minutes at 200°C, and thirty minutes of soaking beforehand.
  • Frozen roast potatoes — Fifteen to eighteen minutes at 200°C from frozen — a third of the time from raw.
  • Potato rösti — Fifteen to eighteen minutes at 180°C for 250g, shaken part-way.
  • Potato gratin — Fifteen to eighteen minutes at 200°C for a 400g portion — and it must be in a dish, not loose.
  • Potato cubes — Twelve to eighteen minutes at 200°C with half a tablespoon of oil.

There is deliberately no cooking time on this page. A food does not have one — a cut, at a thickness, in a state, at a loading, in a particular appliance does. That is what the pages above are for.