Quick Answer: Most leftovers reheat best at 320-350F (160-175C) for 3 to 6 minutes - lower and slower than you’d cook them fresh. Crispy foods like fries and fried chicken go higher (375-400F / 190-205C) for 3 to 4 minutes. Anything with sauce, cheese, or delicate protein goes lower (300-320F / 150-160C) with foil. The single most common mistake is reheating at cooking temperature, which dries the outside before the middle warms.

Reheating is a different job from cooking. When you cook, you’re driving moisture out and building crust. When you reheat, the crust already exists and the moisture is already low - your goal is to warm the centre without finishing that job.

Why does reheating need a lower temperature than cooking?

Because you’re starting from a fundamentally different place.

Fresh food goes into the basket cold and wet, with plenty of internal moisture to buffer high heat. A leftover has already lost much of that moisture, and its surface has already been browned. Hit it with 400F again and the outside passes from browned to dry to burnt while the middle is still cool.

The general rule: drop 25 to 50 degrees Fahrenheit (roughly 15 to 30 Celsius) from the original cooking temperature, and check early.

Two exceptions where you go high instead:

• Foods whose whole point is crispness and which are already fairly dry - fries, onion rings, spring rolls, fried chicken skin. These want a short, hot blast to re-crisp before the interior can dry out.
• Thin, flat items where the centre is only a few millimetres from the surface - a single slice of pizza, a flatbread.

Everything else does better low and slow, which is the opposite of most people’s instinct with an appliance that’s marketed on speed.

The reheating chart, by food type

Times assume a preheated basket and a single layer. Add 1 to 2 minutes if you’re reheating straight from the fridge in a cold basket.

Crispy and fried

• Fries and wedges: 400F / 205C, 3-4 min, shake halfway
• Fried chicken: 375F / 190C, 4-6 min, skin side up
• Spring rolls, samosas: 375F / 190C, 3-4 min
• Breaded fish or cutlets: 350F / 175C, 4-5 min

Pizza and bread

• Pizza slice: 350F / 175C, 3-4 min - crust crisps, cheese re-melts without separating
• Bread rolls, baguette: 320F / 160C, 2-3 min, lightly dampen the crust with wet fingers first
• Croissants and pastry: 300F / 150C, 3-4 min - higher and the butter renders out

Proteins

• Roast chicken pieces: 320F / 160C, 5-7 min, loosely covered with foil
• Steak (to keep it pink): 300F / 150C, 3-5 min - the lowest useful setting; anything hotter overcooks it
• Sausages: 350F / 175C, 4-5 min
• Cooked salmon: 300F / 150C, 4-5 min, covered

Vegetables and sides

• Roasted vegetables: 350F / 175C, 3-5 min
• Rice: 320F / 160C, 4-5 min, sprinkle a tablespoon of water over first and cover with foil
• Pasta with sauce: 320F / 160C, 5-6 min, covered, stirred halfway
• Casserole or lasagne portion: 320F / 160C, 8-10 min, covered for the first 6

What Nobody Tells You About Reheating in an Air Fryer

Four things that don’t appear in the manual and change the results more than the temperature does.

Foil is your friend here, not a rule-breaker. Air fryers get a reputation for being foil-hostile, and the actual rule is simple: foil must be weighed down by food and must not block the air intake. Used correctly, a loose foil cover is what makes rice, casseroles, and roast chicken reheat well instead of drying out.

A tablespoon of water transforms starches. Rice, pasta, and mashed potato reheat beautifully with a splash of water and a cover, and terribly without. The water turns to steam and rehydrates rather than dries.

Single layer, always. This matters more when reheating than when cooking, because there’s less moisture to distribute. A crowded basket steams the food in its own moisture and you get the exact soft texture you were avoiding.

Cold from the fridge beats room temperature for crispy foods. Counterintuitive but consistent: cold fries hit with high heat crisp better than room-temperature ones, because the surface dries before the interior warms. For proteins the opposite is true - 15 minutes on the counter helps them warm evenly.

Which leftovers should not go in the air fryer at all?

A short but useful list, because a few things genuinely reheat worse here than in a microwave or pan.

Anything wet and loose - soups, stews, curries, chilli. There’s nothing to crisp and the circulating air just forms a skin. Use the hob.

Leafy things and anything with a lot of loose light material - rocket, spinach, loose herbs, and shredded cheese sprinkled on top. Light items get blown into the heating element, where they burn and smoke. If a dish has loose cheese on top, press it down or cover it.

Large dense portions - a whole thick casserole dish, a half chicken. The outside will overcook long before the centre reaches temperature. Portion it down first.

Delicate egg dishes - scrambled eggs and omelettes go rubbery fast. Frittata slices are the exception and do fine at 300F for 3 to 4 minutes.

Food safety note that applies regardless of appliance: reheat leftovers until piping hot throughout - 75C / 165F at the centre - and only reheat once. Rice in particular should be cooled quickly, refrigerated within an hour, and eaten within a day.

How do you reheat a full plate without four separate rounds?

The problem with a mixed plate is that fries want 400F and chicken wants 320F. Two approaches work.

Approach 1: staggered, longest first. Start the item that needs the longest and lowest treatment, and add the crispy items for the final 3 minutes at the higher temperature. Meat in at 320F for 5 minutes, bump to 375F, add fries, 3 minutes more. One basket, two settings, one wash-up.

Approach 2: divide the basket. A small foil barrier or a second-layer rack lets you keep sauced food separate from crispy food. The temperature has to be a compromise - 350F usually works - but everything finishes together.

A timing habit worth adopting: set the timer for two-thirds of the chart time and check. Air fryer models vary substantially in real delivered temperature, and the difference between perfect and dry is often 60 seconds. After three or four checks you’ll know your own machine’s offset and stop needing the chart at all.

As the weather cools and you start reheating more baked and roasted food, that offset becomes worth writing on a sticky note inside a cupboard door.

FAQ: Air Fryer Reheating Questions, Answered

Do I need to preheat before reheating?

For crispy foods, yes - 2 to 3 minutes. Putting fries into a cold basket means they spend the first minutes warming rather than crisping, which is exactly when they go soft. For covered, low-temperature reheating it makes little difference.

Can I reheat food in the container it’s stored in?

Only if it’s oven-safe metal or ceramic that fits with clearance. Most plastic tubs aren’t safe at these temperatures, and glass needs to be rated for it - thermal shock from a cold fridge into a hot basket cracks glass.

Why does my reheated food taste dry even at low temperature?

Usually it’s the second reheat, not the temperature. Each reheating cycle drives out more moisture, which is why portioning before you store - so you only reheat what you’ll eat - makes a bigger difference than any setting.

Is it worth spraying oil when reheating?

A very light spray helps crispy foods that have lost their surface fat, particularly fries and breaded items. It does nothing for sauced or covered food, and too much makes reheated food greasy in a way fresh food doesn’t get.

TL;DR:

• Reheat 25-50F below the original cooking temperature - most leftovers land at 320-350F
• Crispy dry foods are the exception: 375-400F for a short blast
• Cover starches and roast meats with foil and add a tablespoon of water
• Single layer always; a crowded basket steams instead of crisps
• Skip the air fryer for soups, loose leaves, whole large portions, and scrambled eggs
• Check at two-thirds of the stated time and learn your own machine’s offset

The chart gets you close on the first attempt. Your machine’s personality does the rest, and it only takes three or four checks to learn it.