Roast potatoes in an air fryer
Fresh — the short answer
190°C (374°F) for 22–30 min
- For
- 700g in total, about 45mm at the thickest point, At room temperature
- In
- Basket air fryer, single layer, pieces touching
- Preheat
- Yes, before the food goes in
- Part way
- shake the basket at about 9 min; shake the basket at about 17 min
- Check
- Deep golden, craggy surface with visible ragged edges
- Safety
- Plug an air fryer directly into a wall socket. Do not run one from an extension lead. Full rule below.
Parboiling is not optional, and it is what the air fryer cannot do for you.
Fresh
The quick answer
190°C (374°F) for 22–30 min
Size of the pieces, and whether they were parboiled — unparboiled potatoes need the top of the range and still come out worse.
- Assuming
- 700g in total, about 45mm at the thickest point, At room temperature
- In
- Basket air fryer
- Loaded
- Single layer, pieces touching
- Preheat
- Yes, before the food goes in
- Result
- Crisp outside, moist inside
Preparation
Parboil for eight to ten minutes until the edges are just soft, drain thoroughly, and shake them hard in the dry pan until the outsides are ragged. Toss in a tablespoon of oil. The parboiling and the roughing-up are the whole technique; the air fryer cannot do either for you.
About 15ml of oil.
How to load the basket
Single layer, pieces touching. Slightly slower, and the touching faces brown less. Usually a few minutes on a twenty-minute cook.
While it cooks
At about 9–12 minutes: Shake the basket
The roughed-up starchy surface needs to meet hot air on every face to crisp.
At about 17–23 minutes: Shake the basket
Catches the faces that were resting against the basket.
How to tell it is done
- Deep golden, craggy surface with visible ragged edges
- They sound hollow and hard when tapped
- A skewer goes into the centre with no resistance
Change the result
Each of these moves the outcome in a known direction, and most cost you something. The trade is stated so you can decide whether you want it.
- Crisper
- Rough them up harder after parboiling. More surface area is worth more than more time.
- Skip the parboiling
- You can, and they will be roast potato-shaped rather than roast potatoes. If you are going to skip it, cut them smaller and expect a smoother, tougher skin.Trade-off: This is the one shortcut in this catalogue that genuinely costs you the result.
In a different appliance
Dual-basket air fryer: 200°C for 30 min
A single published figure for 1.5-inch cubes that have been PRE-BOILED. The parboiling is stated by the manufacturer and it is the whole reason the figure is only thirty minutes.
Multicooker with air fry: 180°C for 25–35 min
Published range, with instructions to rinse, dry and toss in oil and seasoning. The chart does NOT say whether the potatoes are parboiled, which is the missing variable.
Where these figures came from — fresh
- Applies to
- Specific to this type of appliance
- Why this rating
- The preparation carries this record rather than the settings. Recorded that way deliberately: for several foods in this catalogue the decisive variable happens before the appliance is switched on.
- Last reviewed
- 2026-08-13
What this does not cover
- Not measured. These figures are a starting point for controlled testing, not a result of it.
Sources (1)
AirfryerHQ Sprint 1 baseline cooking figures
AirfryerHQ — Calculated or inferred by AirfryerHQ (Not jurisdictional)
Relied on for: The starting time and temperature figures, and the loading they assume.
AirfryerHQ's interpretation of what it says
Citation checked — the document exists and is described correctly
Leftover (reheating)
Before anything else
From national food-safety authorities, not from us. These take precedence over any cooking time below.
Requirement — Food safety (microbiological)
Cool cooked food and get it into the fridge within one to two hours, keep the fridge between 0 and 5°C, and eat leftovers within 48 hours.
How to tell, without a thermometer
- There is no sensory test for this rule, and that is the point: food held too long at the wrong temperature does not necessarily look, smell or taste different
If it has not got there: Throw it away. This is the one rule in this catalogue where the remedy is not 'cook it longer', because cooking does not reverse it.
Important: Cooked rice is the sharpest case: Bacillus cereus toxins form at room temperature and survive reheating. Rice left out for more than an hour goes in the bin.
Requirement — Food safety (microbiological)
Reheat leftovers until steaming hot all the way through, and only reheat them once.
Target: 70°C in the thickest part, or an equivalent from the table below.
How to tell, without a thermometer
- Steam rising from the centre, not just the edges
- The middle is hot to the touch, tested after removing it from the appliance
If it has not got there: Keep going, and break dense food up or spread it out so the heat can reach the middle. If it will not heat through evenly, a microwave to get the centre hot followed by the air fryer to crisp the surface is a better tool for the job than the air fryer alone.
Important: Cooked rice and pasta left at room temperature can develop Bacillus cereus toxins that reheating does not destroy. If cooked rice has been out of the fridge for more than an hour, discard it rather than reheating it.
| Temperature | Held for | Measured at |
|---|---|---|
| 70°C | 2 min | the centre of the food |
| 75°C | 30 sec | the centre of the food |
The quick answer
160°C (320°F) for 6–12 min
Longer than chips because a roast potato is far denser. Within the general reheating window; the band is AirfryerHQ's.
- Assuming
- 400g in total, From the fridge
- In
- Basket air fryer
- Loaded
- Single layer, pieces not touching
- Preheat
- Not needed
- Result
- Heated through
Preparation
Single layer from the fridge. No oil needed — there is enough already on them.
No oil needed.
How to load the basket
Single layer, pieces not touching. The reference condition. Air reaches every surface, and times are the shortest the food will achieve.
While it cooks
At about 3–6 minutes: Shake the basket
Turning them re-crisps the faces that were down.
How to tell it is done
- Hot right to the middle when one is broken open
- The crust has firmed up rather than gone soft
In a different appliance
Basket air fryer: 180°C for 5–8 min
Potato size. A large roastie has a genuine centre to heat; a small one does not.
Where these figures came from — leftover (reheating)
- Applies to
- Specific to this type of appliance
- Why this rating
- A roast potato is dense, so the centre lags the surface further than a chip's does. The temperature sits within the manufacturers' reheating window and the longer band is AirfryerHQ's inference from density.
- Last reviewed
- 2026-08-13
What this does not cover
- THE PUBLISHED FIGURE IS A GENERAL REHEATING METHOD, NOT A TIME FOR THIS FOOD. Applying it to this food is AirfryerHQ's inference from three manufacturers' converging guidance, and it is labelled as one.
- Reheating is governed by the food-safety rule, not by the clock. A time that ends before the centre is steaming hot has not finished, whatever the timer says.
Sources (3)
Tower T17067 4L Digital Air Fryer — Safety and Instruction Manual (PDF)
RKW Ltd (Tower Housewares) — Manufacturer manual (United Kingdom)
Relied on for: A general reheating instruction of 150°C for up to 10 minutes.
States this directly
Passage read and verified
Retrieved 2026-08-13 from argos-support.co.uk
Retrieved from Argos's manual library for Argos product 947/6769. The document carries no revision code.
Instant Vortex 4-in-1 Air Fryer — User Manual (PDF)
Instant Brands (EMEA) Limited — Manufacturer manual (United Kingdom and European Union)
Relied on for: A Reheat programme with a default of 138°C and a ceiling of 182°C, below the 205°C the cooking programmes reach — the appliance enforcing that reheating is not cooking.
States this directly
Passage read and verified
Retrieved 2026-08-13 from argos-support.co.uk
Retrieved from Argos's manual library for Argos product 936/1104. Covers the Vortex 4 and Vortex 6 in one document.
Ninja Foodi MAX Dual Zone Air Fryer AF400UK — Instructions (PDF)
SharkNinja Europe Limited — Manufacturer manual (United Kingdom)
Relied on for: A Reheat function preset to 170°C.
States this directly
Passage read and verified
Retrieved 2026-08-13 from argos-support.co.uk
Retrieved from Argos's manual library, which mirrors the manufacturer's booklet for Argos product 952/3997. Not retrieved from ninjakitchen.co.uk, whose support portal redirected to an authentication gate.
From frozen
No time or temperature for this, and not by accident
Roast potatoes is sold and cooked from frozen, so the question is a real one. AirfryerHQ holds no published figure for it: not one of the manufacturer manuals read for this catalogue gives a chart row for this food in this state.
We are not going to produce one by adjusting the fresh figure above. A time arrived at that way would appear on this page looking exactly like a time somebody measured, and you would have no way to tell the difference.
What still governs, figure or no figure
These rules come from national food-safety authorities and apply whether or not anybody has published a cooking time. They are the part of this question we can answer.
Requirement — Food safety (microbiological)
Food cooked from frozen must reach the same core temperature as the same food cooked fresh — the frozen centre is the last thing to get there.
Target: 70°C in the thickest part.
How to tell, without a thermometer
- No ice or cold spot at the centre when the thickest piece is cut open
- Steaming hot throughout, tested in the middle rather than the edge
If it has not got there: Reduce the temperature by 10–20°C and give it longer. A lower set point lets the centre catch up before the surface passes the point of no return, and it is the single most useful adjustment for cooking from frozen.
Important: If the packaging says the product must be thawed before cooking, follow it. That instruction exists because the manufacturer has tested cooking it from frozen and it did not reach temperature reliably.
What we do hold for roast potatoes: fresh, leftover (reheating). Those are a different question, not a starting point for this one.
What usually goes wrong
Smooth, leathery skins with no crunch. The potatoes were not parboiled, or were not roughed up afterwards, so there was no ragged starchy surface for the hot air to work on.
Running the appliance safely
These apply to every food and every air fryer, so they are here once rather than repeated under each state above. They come from Electrical Safety First, from UK product-safety notices and from the manufacturers’ own manuals.
- Plug an air fryer directly into a wall socket. Do not run one from an extension lead.
- An unusual smell, an unusual noise, or scorch marks on the plug mean stop using it and contact the manufacturer.
- Do not overfill. Food touching the heating element is a fire risk, not a cooking problem.
- White smoke from fatty food is usually normal. Black smoke means unplug it immediately.
- Do not leave an air fryer running unattended.
- Leave clear space above and around the appliance, and never cover the air intake or the outlet.
- Aim for a golden yellow colour or lighter on starchy foods such as chips and roast potatoes, rather than a darker brown.
- Buy from a reputable retailer rather than a third-party marketplace seller.
- Clean the drawer, the plate and the element after use. Accumulated grease is what smokes, and then what burns.
- Register the appliance with its manufacturer. It is how a recall reaches you.
- Do not rely on the appliance's own thermal protection. A UK recall was issued because it did not operate.
Each links to its own page, with what it means in practice, what to do if it has already happened, and the source it comes from. Every safety rule AirfryerHQ holds.
Why potato behaves this way
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.
Where to go from here
The pages that answer the questions this one tends to raise.
- Using a thermometer, and where to put itThe times above are for a piece that is not the one you are holding. This measures yours — and it is the single change that fixes most dry roast potatoes.
- How food actually gets crispyWhy patting it dry, spacing it out and a little oil are all the same instruction — so you can apply it when a page runs out.
- Cooking from frozenUsually cooler and longer than the same food fresh, and never worked out from the fresh figure.
- Reheating leftoversA different question governed by a different rule — steaming hot throughout, and only once.
- Why published timings differIf another chart says something else, this is usually why — and which one to believe.
- Are air fryers healthier? What can honestly be saidLess oil than deep frying is a real and narrow claim. Almost everything built on top of it is not, and one genuine chemical question is worth knowing about.
- Air fryer or microwave?They heat food by unrelated mechanisms and are bad at opposite things. This is not a choice between two appliances so much as a rule for which to reach for.
- Is an air fryer cheaper to run than an oven?For one or two portions, decisively. For a full meal, it depends on how many times you have to run it — and that is the term nobody includes.
- What litres actually mean, and why they misleadLitres measures the box, not the cooking. The number that would answer your question is published by nobody, and this page explains what to do about that.
If it went wrong
The ways roast potatoes specifically tends to fail, each with the fastest thing to check first.
- Chips and fries come out soggy — Almost always the basket being too full. The steam has nowhere to go and condenses back onto the food.
Easily confused with
- Potato wedges — A different cooking problem with a different answer.
- Frozen chips — A different cooking problem with a different answer.