Whole sweet potato in an air fryer
Fresh — the short answer
190°C (374°F) for 35 min
- For
- 300g per piece, 2 pieces, At room temperature
- In
- Dual-basket air fryer, single layer, pieces not touching
- Preheat
- Yes, before the food goes in
- Check
- A skewer meets no resistance at the centre
- Safety
- Plug an air fryer directly into a wall socket. Do not run one from an extension lead. Full rule below.
Thirty-five minutes at 190°C — cooler than a jacket potato, and for a reason.
Fresh
The quick answer
190°C (374°F) for 35 min
A single published figure for a whole sweet potato. The same chart gives an ordinary jacket potato 40 minutes at 200°C — shorter AND cooler here, which is the sugar.
- Assuming
- 300g per piece, 2 pieces, At room temperature
- In
- Dual-basket air fryer
- Loaded
- Single layer, pieces not touching
- Preheat
- Yes, before the food goes in
- Result
- Just cooked
Preparation
Prick the skin. No oil needed; sweet potato exudes its own sugars.
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.
How to tell it is done
- A skewer meets no resistance at the centre
- Sugar caramelising and bubbling out of any split in the skin
In a different appliance
Multicooker with air fry: 200°C for 25–30 min
Tuber weight within the published 185-250g band. Nothing here scales beyond that band — a 400g sweet potato is not covered by this figure.
Where these figures came from — fresh
- Applies to
- Specific to this model
- Why this rating
- The side-by-side comparison in one chart is what makes this useful. Sweet potato published cooler and shorter than an ordinary potato is exactly what its sugar content predicts, and it is a distinction most published guidance loses.
- Last reviewed
- 2026-08-13
What this does not cover
- Published by the manufacturer for this model. It is evidence about this appliance and is not general advice.
Sources (1)
Cookworks 9L Dual Air Fryer KDF-5577DTW — Instruction Manual (PDF)
Argos Limited (Cookworks) — Manufacturer manual (United Kingdom)
Relied on for: Sweet potato, whole, 35 minutes at 190°C; jacket potato, whole, 40 minutes at 200°C in the same chart.
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 148/6630. Cookworks is Argos's own brand; the manual names the manufacturer only by model number KDF-5577DTW.
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
170°C (338°F) for 8–14 min
Tuber size. As with a jacket potato, the mass is the whole variable.
- Assuming
- 215g per piece, 2 pieces, From the fridge
- In
- Basket air fryer
- Loaded
- Single layer, pieces not touching
- Preheat
- Not needed
- Result
- Heated through
Preparation
Whole, or halved to cut the time roughly in half.
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.
How to tell it is done
- The skin has dried and tightened again
- The centre is too hot to hold when opened
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.
- To be sure it is safe rather than just warm
- Go by the food and not the clock. It has to be steaming hot the whole way through, and the middle of a dense portion lags a long way behind its surface in an air fryer.
Where these figures came from — leftover (reheating)
- Applies to
- Specific to this type of appliance
- Why this rating
- Mid-band and long. The time is AirfryerHQ's estimate.
- Last reviewed
- 2026-08-13
What this does not cover
- THE TIME ON THIS RECORD IS NOT SOURCED. Five manufacturers publish a reheating temperature and not one names a food, a quantity or a time for a named dish. The temperature sits inside their band; the time is AirfryerHQ's estimate and has not been measured.
- Reheating is governed by the food-safety rule above rather than by this figure. Steaming hot throughout is the requirement; the time is a guide to getting there.
Sources (4)
Tefal Easy Fry Max EY245B40 5L Air Fryer — Instruction Manual (PDF)
Groupe SEB (Tefal) — Manufacturer manual (United Kingdom)
Relied on for: That this manufacturer's published reheating instruction is 160°C for up to ten minutes, with no food named.
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 328/8568.
Tower T17023 2.2 Litre Air Fryer — Safety and Instruction Manual (PDF)
RKW Ltd (Tower Housewares) — Manufacturer manual (United Kingdom)
Relied on for: That this manufacturer publishes 150°C for up to ten minutes for reheating.
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 745/2194.
Cookworks 5L Digital Air Fryer KDF-596D — Care & Instruction Manual (PDF)
Argos Limited (Cookworks) — Manufacturer manual (United Kingdom)
Relied on for: That this manufacturer publishes 180°C for up to ten minutes for reheating.
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 148/6623.
AirfryerHQ Sprint 5 analysis of published guidance across twenty-one manuals
AirfryerHQ — Calculated or inferred by AirfryerHQ (United Kingdom)
Relied on for: The reading that six published reheating positions across five manufacturers span 150-180°C, that three cap the time at ten minutes, and that none names a food — so the time on this record is AirfryerHQ's estimate.
AirfryerHQ's interpretation of what it says
Citation checked — the document exists and is described correctly
What usually goes wrong
A blackened, split skin over flesh that has gone to liquid at the edges. Sweet potato exudes sugar as it cooks and that sugar burns onto the skin and onto whatever it is sitting on. The lower published temperature is not a rounding — it is the manufacturer avoiding exactly this.
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 sweet potato behaves this way
Sweet potato carries far more sugar and far less of the fine surface starch that makes a chip crisp. The sugar caramelises and then burns at temperatures a regular chip is perfectly happy at, which is why the published whole-roast figure is 190°C where a jacket potato is 200°C. The flesh also holds more water and less structure, so wedges soften rather than developing the fluffy interior a floury potato gives. A sweet-potato chip that is genuinely crisp is difficult and usually involves a coating.
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 whole sweet potato.
- 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.
- 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.
Easily confused with
- Jacket potato — A different cooking problem with a different answer.