Dried beetroot slices in an air fryer
Fresh — the short answer
60°C (140°F) for 360–480 min
- For
- 400g in total, about 3mm at the thickest point
- In
- Multicooker with air fry, single layer, pieces not touching
- Preheat
- Not needed
- Check
- Snaps or tears cleanly rather than bending
- Safety
- Plug an air fryer directly into a wall socket. Do not run one from an extension lead. Full rule below.
Six to eight hours at 60°C for 3mm slices.
Fresh
The quick answer
60°C (140°F) for 360–480 min
Slice thickness, for published 3mm slices from peeled beetroot.
- Assuming
- 400g in total, about 3mm at the thickest point
- In
- Multicooker with air fry
- Loaded
- Single layer, pieces not touching
- Preheat
- Not needed
- Result
- Crisp throughout
Preparation
Peeled and cut into 3mm slices. No oil.
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
- Snaps or tears cleanly rather than bending
- No cool, damp patch in the middle of a slice when it is torn
Where these figures came from — fresh
- Applies to
- Specific to this model
- Why this rating
- A published dehydrating row with a stated slice thickness, which is the only variable that materially moves a drying time. The manufacturer's booklet states separately that the appliance does not preheat in this mode.
- 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.
- Dehydrating removes water without cooking. Nothing here is a cooking time and none of these figures brings food to a safe temperature.
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 beetroot slices dried.
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.
Chilled
No time or temperature for this, and not by accident
Dried beetroot slices is sold and cooked chilled, 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 we do hold for dried beetroot slices: fresh. Those are a different question, not a starting point for this one.
What usually goes wrong
Slices that stay leathery rather than snapping. Beetroot's sugar concentration is high enough that under-drying leaves them pliable, and the only remedy is more time — the temperature must not be raised or they scorch.
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 beetroot behaves this way
A beetroot is a dense storage root with a high sugar content and a skin that behaves as a seal. Cooked whole, it effectively steams in its own moisture inside that skin while the outside dries — which is why no oil is called for and why the time is so long. The sugars concentrate rather than caramelising, because the surface never gets dry enough to brown properly until very late. Cut it up first and the whole character changes: the cut faces caramelise fast and the flesh dries out, which is a different and less good result rather than a faster version of the same one.
Where to go from here
The pages that answer the questions this one tends to raise.
- 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.
- Why published timings differIf another chart says something else, this is usually why — and which one to believe.
Easily confused with
- Dried apple slices — A different cooking problem with a different answer.