Halved tomatoes in an air fryer
Fresh — the short answer
170°C (338°F) for 10 min
- For
- 90g per piece, about 30mm at the thickest point, 4 pieces, At room temperature
- In
- Dual-basket air fryer, single layer, pieces not touching
- Preheat
- Yes, before the food goes in
- Check
- The cut face has dried and concentrated rather than blackened
- Safety
- Plug an air fryer directly into a wall socket. Do not run one from an extension lead. Full rule below.
Ten minutes at 170°C — the lowest cooking temperature in the whole catalogue.
Fresh
The quick answer
170°C (338°F) for 10 min
A single published figure at 170°C — the lowest cooking temperature anywhere in this catalogue, and thirty degrees below the same chart's default for almost everything else.
- Assuming
- 90g per piece, about 30mm at the thickest point, 4 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
Halve, place cut side up, season and drizzle with a little oil.
About 5ml of oil.
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 cut face has dried and concentrated rather than blackened
- The tomato has slumped but not collapsed
In a different appliance
Multicooker with air fry: 260°C for 7 min
A single published figure of seven minutes for six to ten halved tomatoes totalling 360g, not a range.
Where these figures came from — fresh
- Applies to
- Specific to this model
- Why this rating
- The single most striking temperature in the evidence base. A chart that runs at 200°C for almost everything drops thirty degrees for one row, and the reason — an exposed wet sugary cut face directly in the airflow — is worth explaining rather than just recording.
- 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.
- A single published figure rather than a range. AirfryerHQ has not invented a tolerance around it.
Sources (1)
Cookworks 9L Dual Air Fryer KDF-5577DTW — Instruction Manual (PDF)
Argos Limited (Cookworks) — Manufacturer manual (United Kingdom)
Relied on for: Large tomatoes, halved, 10 minutes at 170°C.
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)
No time or temperature for this, and not by accident
Halved tomatoes is sold and cooked leftover (reheating), 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)
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 |
What we do hold for halved tomatoes: fresh. Those are a different question, not a starting point for this one.
What usually goes wrong
A scorched cut face over a cold centre. At 200°C the exposed flesh — wet, sugary and directly in the airflow — browns and then blackens long before the tomato has softened. The published 170°C exists for exactly this reason and it is worth respecting.
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 tomatoes behaves this way
A whole cherry tomato is a sealed bag of liquid behind a skin that resists heat until it splits, so the job is to blister the skin before it bursts. A halved tomato is an open cut face full of water and sugar, and the job is the opposite: drive off water slowly enough to concentrate the sugars without scorching the exposed flesh, which is why the published temperature drops by thirty degrees. Tomatoes also flood a small chamber with steam, which is worth knowing before putting them in alongside anything meant to be crisp.
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 halved tomatoes.
- 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
- Cherry tomatoes — A different cooking problem with a different answer.