Halloumi slices in an air fryer
Chilled — the short answer
260°C (500°F) for 2–4 min
- For
- 675g in total, about 30mm at the thickest point, From the fridge
- In
- Multicooker with air fry, single layer, pieces not touching
- Preheat
- Yes, before the food goes in
- Part way
- turn the pieces over at about 1 min
- Check
- Dark bar marks on both faces
- Safety
- Plug an air fryer directly into a wall socket. Do not run one from an extension lead. Full rule below.
Two to four minutes for 3cm slices brushed with oil.
Chilled
The quick answer
260°C (500°F) for 2–4 min
Slice thickness, for a published 675g cut into 3cm slices and brushed with oil.
- Assuming
- 675g in total, about 30mm at the thickest point, From the fridge
- In
- Multicooker with air fry
- Loaded
- Single layer, pieces not touching
- Preheat
- Yes, before the food goes in
- Result
- Browned but not crisp
Preparation
Patted dry, cut into 3cm slices, brushed lightly with oil.
About 10ml 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.
While it cooks
At about 1–2 minutes: Turn the pieces over
Both faces need the plate, and the second face takes about half the time of the first.
How to tell it is done
- Dark bar marks on both faces
- Still squeaky under the teeth rather than soft and greasy
Where these figures came from — chilled
- Applies to
- Specific to this model
- Why this rating
- A published row from the manufacturer's grill chart, with the named temperature level converted to degrees using the table in the same manufacturer's instruction booklet. Both documents were read; neither figure is inferred.
- Last reviewed
- 2026-08-13
What this does not cover
- Published by the manufacturer for this appliance. It is evidence about this machine and is not general advice.
- This is a contact grill plate rather than a perforated basket. Heat reaches the food by conduction from the plate as well as by airflow, which is a different mechanism from air frying and transfers poorly to a basket machine.
Sources (1)
Ninja Foodi MAX Health Grill & Air Fryer AG551UK — Inspiration Guide and cooking charts (PDF)
SharkNinja Europe Limited — Manufacturer cooking chart (United Kingdom)
Relied on for: The temperature, time and quantity for halloumi slices.
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 735/0124, published alongside the instruction booklet as a second document.
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 2–4 min
Slice thickness. Halloumi that has set hard in the fridge softens again quickly.
- Assuming
- 200g in total, about 30mm at the thickest point, From the fridge
- In
- Basket air fryer
- Loaded
- Single layer, pieces not touching
- Preheat
- Not needed
- Result
- Heated through
Preparation
In one layer, spaced. Nothing added.
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
- Warm through and squeaky again rather than rubbery
- No fat pooling underneath
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 short, because halloumi's protein structure gives way if it is held hot. The time is AirfryerHQ's estimate.
- Last reviewed
- 2026-08-13
What this does not cover
- THE TIME ON THIS RECORD IS NOT SOURCED. Four manufacturers publish a reheating temperature and not one of them names a food, a quantity or a time for a named dish. The temperature here is theirs; 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)
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's published reheating instruction is 150°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 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's published reheating instruction is 180°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 148/6623.
Cosori Dual Blaze 6.4L Smart Air Fryer CAF-P583S-KUK — User Manual (PDF)
Arovast Corporation (Cosori) — Manufacturer manual (United Kingdom)
Relied on for: That this manufacturer's Reheat function defaults to 175°C for five 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 818/0159.
AirfryerHQ Sprint 4 analysis of published cooking guidance across fifteen manuals
AirfryerHQ — Calculated or inferred by AirfryerHQ (United Kingdom)
Relied on for: The reading that no manufacturer publishes a reheat time for a named food, and that the time on this record is therefore AirfryerHQ's own estimate.
AirfryerHQ's interpretation of what it says
Citation checked — the document exists and is described correctly
What usually goes wrong
Greasy rather than squeaky. Halloumi's structure holds until it does not, and past about five minutes the protein network gives way, the fat separates and the slice slumps.
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 halloumi behaves this way
Halloumi is made by heating the curd before it is pressed, which denatures the proteins into a structure that softens rather than flowing when it is heated again. That is what makes it grillable and it is also its limit: hold it too long and the structure finally gives, the fat separates and it goes from squeaky to greasy. The surface browns fast because of the milk sugars and the salt from the brine, and the salt is also why it needs no seasoning and why it draws its own moisture to the surface if it sits cut for too long before cooking.
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 halloumi slices.
- 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.