Foods you shouldn't cook in an air fryer (and why)

Last reviewed on 28 April 2026.

Air fryers are good at a lot of things, but they're not universal cookers. A handful of foods reliably go wrong in them — for reasons rooted in how the appliance works, not in technique. This guide is the list, and the underlying reasoning so you can apply it to anything that isn't on it.

The principle: hot air is the problem and the solution

An air fryer cooks by moving heated air across food at speed. That's why it crisps and browns so well — and it's also why certain foods fail. When the airflow is the cooking medium, anything that gets blown around, anything that needs to sit in a pool of liquid, and anything too dense for the air to penetrate before the surface burns is going to misbehave.

Run a candidate food through three questions: Will it stay put? Does it need to cook in or alongside liquid? Is the inside-to-outside ratio reasonable for fast surface heat? If the answer to any of those is "no", the air fryer is probably the wrong tool.

Wet batters

The deep-fryer staple — fish in beer batter, tempura, fritters dipped from a bowl — does not transfer to the air fryer.

Hot oil cooks the batter from all sides at once and sets it before it can drip; hot air cooks too slowly to set a wet coating, so the batter slumps off the food and pools through the basket holes. What's left on the food is patchy and rubbery; what dripped through bakes onto the heating element.

What to do instead. Use dry coatings — flour, breadcrumbs, panko, crushed cereal — or pre-fried frozen battered foods (which are sealed before they reach you). For homemade fish in batter, use a pan or a deep fryer.

Leafy greens (raw)

Spinach, kale, lettuce, basil — anything light and leafy will fly. The fan is strong enough to lift loose leaves into the heating element, where they char or smoke immediately.

What to do instead. If you want air-fried kale chips, weight them down with the air-fryer rack or skewer them onto a heavier base. Drier, sturdier vegetables like the ones in our vegetables guide are a better fit if you want crisp.

Cheese on its own

A slice of cheese laid in the basket will melt straight through the holes and onto the drip pan, where it burns. Even on parchment, melted cheese spreads and sticks.

What to do instead. Cheese works fine when it's part of a contained dish — a stuffed pepper, a casserole in a small oven-safe dish, melted on top of something else for the last minute or two. Leave plain blocks of cheese out of the basket.

Rice, pasta, and other grains (raw)

These all need to absorb water during cooking. The air fryer dries food out; it cannot simulate boiling. Adding water to the basket either evaporates instantly or leaks through to the heating element.

What to do instead. Cook grains on the stove or in a rice cooker, then if you want texture, finish them in the air fryer (cold leftover rice crisped at high heat is genuinely good).

Saucy and soupy dishes

Anything with more than a thin coating of liquid — stews, curries, ramen, brothy braises — has the same problem as raw grains: there's no way to keep liquid on the food. It either pours through the basket or pools and burns onto the bottom.

What to do instead. Reduce sauces separately, then glaze finished food in the basket for the last minute. Reheat saucy leftovers in a small oven-safe dish placed inside the air fryer if the dish fits, but cover it with foil so the surface doesn't dry out.

Whole large roasts

A 4-lb pork shoulder or a whole turkey breast that's larger than the basket will burn on the outside before the inside reaches a safe internal temperature. Even when the food fits, the air fryer cooks the surface so aggressively that there isn't enough time for heat to travel to the centre.

What to do instead. For anything thicker than about 4 cm (1.5 in) at the centre, reduce the temperature substantially (to 140–160 °C / 285–325 °F) and extend the time, or finish in the oven. Always verify with a probe thermometer.

Most baked goods (without a tin)

A wet batter for cake or muffins poured directly into the basket behaves like the wet-batter problem above. Doughs that need to rise and set need a structure to hold them.

What to do instead. Use a cake tin, ramekins, or silicone moulds that fit inside the basket. Our baking guide covers this in detail.

Items that hide moisture (whole eggs in shell)

Whole eggs in their shell can be cooked in an air fryer, but they're a frequent source of small explosions, especially when the shell has a tiny crack. Hard-boiling on the stove is faster, more controllable, and lower risk.

What to do instead. If you want air-fried eggs, crack them into a ramekin or small dish.

Toxic or pressure-sensitive items

Two genuine safety items rather than texture issues:

• Anything that came in a sealed pouch. Whole sealed packets — boil-in-bag rice, vacuum-packed sausages still in their plastic — can rupture or leach plastic compounds when heated dry. Open the pouch first.
• Items meant for pressure cooking. Some prepared meals are designed to cook under pressure; without it they may not reach a safe internal temperature even when they look done. Read the packaging instructions before improvising.

The shortlist

• Wet batter applied directly to food
• Loose leafy greens
• Bare cheese in the basket
• Raw grains and pasta
• Soupy or saucy dishes without a contained dish
• Roasts thicker than ~4 cm at the centre, run on default settings
• Cake or muffin batter without a tin
• Whole eggs in shell, when speed and control matter
• Sealed pouches and pressure-required meals

What this list isn't saying

"Don't cook in an air fryer" is not the same as "won't cook at all". Several entries above can be made to work with a workaround — a tin, a rack, a lower temperature, a different prep. The guidance is to know when you're working against the appliance instead of with it.

For technique-level mistakes (overcrowding, skipping a shake, forgetting to preheat), see 10 air fryer mistakes to avoid. For the foods that genuinely work well — including from frozen — the cooking frozen foods and vegetables guides are the better starting points.

The Five Reasons a Food Fails in an Air Fryer

Most air fryer failures trace back to the same small set of causes. Once you understand the mechanism, you can predict whether any food will work — without needing a list to look it up. An air fryer is, at its core, a compact convection oven with a very powerful fan; see how air fryers work for the full picture. That fan is both the feature and the limitation.

• 1. It's too light and dry — the airflow blows it around. The fan moves air at speed. Small, low-density items — loose herbs, single tortilla chips, a pinch of breadcrumbs — lift off the basket and get carried toward the heating element, where they char almost instantly. Weight matters more than most people expect.
• 2. It melts or leaks before it sets. Wet batters, raw cheese, and heavily glazed foods all have coatings that need to firm up before they lose contact with the food. Hot oil in a deep fryer surrounds the item on all sides and cooks the coating in seconds. Air cooks from one direction at a time and takes longer to set a surface — by which point wet or liquid coatings have already dripped through the basket holes.
• 3. It dries out or burns because there's nothing protecting it. The constant hot airflow pulls moisture from the surface of food. Thin, lean items — delicate fish, lean poultry breast without a coating, or food with a high surface-to-mass ratio — can overcook on the outside before they're safe inside, or turn dry and tough.
• 4. It's too big or dense to cook through before the outside overcooks. The air fryer works fast precisely because the circulating air is hotter than a conventional oven would be at the same effective cooking rate. That's great for thin cuts. For a thick roast or whole bird, the outside is exposed to intense heat for the entire cook time while the centre still hasn't reached temperature — producing a burnt exterior and raw interior.
• 5. It needs to cook in liquid. Rice needs to absorb water. Pasta needs to hydrate in a boiling bath. Braises and stews need to bubble in sauce. The air fryer basket can't hold a cooking liquid; any liquid you add either evaporates immediately or pours through the base. There's no workaround for foods that require immersion cooking — use the right tool.

Foods That Need a Workaround, Not Avoidance

Several foods that appear on every "don't cook this" list are actually fine in an air fryer — with a small adjustment to method. The table below covers the most common ones.

Food	Why it struggles	Workaround
Wet-battered foods (beer batter, tempura)	Wet coating drips through the basket before it sets; airflow can't crisp it fast enough	Use a dry dredge instead — flour, beaten egg, then breadcrumbs or panko. Pre-fried frozen battered products also work because the coating is already set.
Leafy greens (kale, spinach)	Very low mass; the fan lifts leaves into the heating element	Place a rack or second basket insert on top to weigh them down, or press them under heavier ingredients. Drop the temperature to around 150 °C / 300 °F and check frequently.
Loose cheese	Melts and drips through the basket holes before browning	Freeze sliced cheese for 15–20 minutes before cooking, keep it inside a stuffed item, or place it on a parchment-lined tray for the last 2–3 minutes only.
Light dry items (single herbs, raw tortillas)	Blow around and can hit the element or cook unevenly	Weigh down with a heavier food on top, or press under a rack. Alternatively brush lightly with oil — the added weight and moisture help.
Delicate fish (thin fillets, sole, tilapia)	High surface-to-mass ratio; dries out quickly and can flake apart	Use a parchment sling or a small foil tray to hold moisture around the fish and make lifting it out easier. Cook at a lower temperature (170 °C / 340 °F) and check early.
Rice and pasta	Need boiling water to hydrate — the air fryer can't provide that	Cook conventionally first. Cold cooked rice and leftover pasta both crisp up beautifully at high heat in the air fryer — use it as a finishing step, not a primary cook.

Specific Foods to Be Careful With

Raw rice, dried pasta, and dried beans

All three require prolonged exposure to boiling water to soften and become digestible. Raw dried beans in particular contain compounds — including lectins — that are only broken down by boiling for a sustained period; cooking them any other way is a food safety issue, not just a texture one. Boil all three on the hob first, then use the air fryer to crisp or reheat the cooked result.

Cheese on its own

A block or slice of cheese placed directly in the basket will melt in the first two minutes and pour through the holes. Even on parchment it tends to spread and stick. The fix is containment: melt cheese inside a stuffed pepper, on top of a crumpet or piece of toast placed in a foil tray, or as the last layer of a small baked dish. Never treat the basket as a cheese-melting surface.

Saucy or very wet dishes

Curries, stews, ragu, shakshuka — anything that is mostly liquid — gain nothing from the air fryer. The circulating air provides no benefit for a dish that's braising in its own sauce, and the liquid will either leak through the basket or splatter upward onto the heating element. If you want to reheat something saucy, put it in a covered, oven-safe dish inside the air fryer and treat it like a small oven. Don't pour it directly into the basket.

Large whole roasts and big whole birds

The limiting factors are physical size and the heat-penetration problem described above. Most basket air fryers max out at roughly 2–2.5 kg for a whole bird. Beyond that, the food won't fit, or the top will be pressed against the element. Even within the size limit, anything with a thick cross-section (a bone-in pork shoulder, a rolled beef joint) needs the temperature significantly reduced — to around 150–160 °C / 300–320 °F — and a probe thermometer to verify the centre. Default high-heat presets will burn the outside.

Light leafy herbs and edible flowers

Fresh sage, rosemary sprigs, thyme branches, and any edible flowers go from perfectly placed to charred scraps in under a minute. If you want to add herbs to a dish in the air fryer, bury them under the main ingredient or add them only in the final 60–90 seconds of cooking. Dried herbs tolerate the heat better because they're already dehydrated, but they still benefit from being pressed into or under food.

Buttered bread and sugary glazes added too early

Butter-soaked bread (think garlic bread or buttered crumpets) browns very fast because butter has a lower smoke point than most oils — expect it to be ready in 3–4 minutes at 180 °C / 350 °F rather than the 8–10 you might expect from an oven. The real risk is sugar: glazes, honey coatings, barbecue sauces with high sugar content, and sweet marinades will burn well before the food inside is cooked through. Apply sugary glazes only in the last 2–3 minutes of cooking.

Foods People Wrongly Think You Can't Air Fry

The things-to-avoid narrative has a tendency to overshoot. A lot of foods get added to informal "don't cook these" lists because someone had a bad first result — usually from overcrowding or the wrong temperature — not because the food genuinely can't be air fried. Here are common examples that work well with the right approach.

• Eggs. Whole eggs in shell are risky (pressure, potential cracking), but cracked eggs in a small ramekin or silicone cup cook into perfectly set baked eggs at 160 °C / 320 °F in about 6–8 minutes. Scrambled eggs in a ramekin also work, though the texture differs slightly from pan-cooked.
• Bacon. Works well in a single layer at around 180 °C / 360 °F in 8–12 minutes depending on thickness. Expect some smoke from the fat; a splash of water in the drawer helps. The result is crispier and less greasy than pan-fried. See the cooking frozen foods guide if you're starting from frozen.
• Reheated pizza and chips. Two of the air fryer's best use cases. Pizza re-crisps the base far better than a microwave; chips regain their crunch in 3–5 minutes at high heat. Neither needs any oil added.
• Most vegetables. Broccoli, courgette, peppers, asparagus, green beans, cherry tomatoes — almost anything that isn't a leafy green roasts superbly. See the full vegetables guide for temperatures and times.
• Frozen breaded and battered products. Fish fingers, chicken nuggets, mozzarella sticks, spring rolls — these are pre-fried in the factory, so the coating is already set when it goes into your basket. They are arguably the air fryer's ideal food. Full guidance is in the cooking frozen foods guide.
• Small cakes, muffins, and baked goods. In a tin or silicone mould that fits the basket, small cakes bake faster than in a conventional oven and come out with a good crust. The baking guide covers ratios, tin sizing, and timing adjustments.

Foods-to-Avoid FAQ

Can you put liquid in an air fryer?

Not as a cooking liquid — there's no way to keep it in the basket. However, two small uses do work. First, a tablespoon or two of water poured into the bottom drawer (below the basket) during a fatty cook reduces smoke by stopping dripped fat from scorching on the hot metal. Second, a contained dish — a ramekin, a small baking tin, a foil tray — placed inside the basket can hold a small amount of liquid, turning the air fryer into a compact oven for dishes that need a little moisture. Never pour liquid directly into the basket mesh.

Why can't you use wet batter in an air fryer?

In a deep fryer, extremely hot oil surrounds the battered item from all directions simultaneously and cooks the outside coating in seconds — it sets before it has time to flow. Air fryers cook with moving air, which transfers heat more slowly and from fewer directions at once. A wet batter stays liquid long enough to drip off the food and pool in the base of the basket or on the heating element. The result is a patchy, part-raw coating on the food and a burnt mess underneath. Dry coatings — flour, egg wash followed by breadcrumbs — set much faster under airflow and are the correct substitute.

Can you air fry leafy greens at all?

Yes, with the right setup. Kale chips are a well-established air fryer recipe: massage the leaves with a small amount of oil, spread them in the basket, place a rack or insert on top to weigh them down, and cook at a lower temperature (around 150 °C / 300 °F) for 5–8 minutes, checking every couple of minutes. Spinach is harder because the leaves are thinner and wilt into very small, light pieces that are difficult to contain — it's easier to add spinach raw to a hot dish after air frying the rest of it. The key principle for any leafy green is weight and lower heat.

Is it bad to overfill the basket?

Yes — this is one of the most common reasons for disappointing results. The air fryer crisps food by circulating hot air around every surface. When the basket is packed too tightly, food in the middle can't be reached by the airflow: it steams in the moisture from the surrounding pieces instead of crisping. The result is soft, patchy, and unevenly cooked. Cook in batches if needed, and never fill more than about two-thirds of the basket depth for items that need to crisp. For more on this and other common technique errors, see 10 air fryer mistakes to avoid.

Can you cook a whole roast dinner in one air fryer?

In theory, a small air fryer oven (rather than a compact basket model) can handle more elements of a roast dinner — but even then, practical capacity limits what you can do at once. Most basket air fryers will comfortably roast vegetables and handle a small joint or chicken pieces, but a whole large roast alongside a full set of sides generally isn't feasible in a single cook. The common approach is to cook roast vegetables and potatoes in the air fryer (they're arguably better there than in an oven) while the meat rests after cooking through a different method. For cook times by food type and weight, see the air fryer cooking times guide.