Celeriac cubes in an air fryer
Fresh — the short answer
200°C (392°F) for 12–14 min
- For
- 600g in total, about 15mm at the thickest point, At room temperature
- In
- Multicooker with air fry, single layer, pieces not touching
- Preheat
- Yes, before the food goes in
- Part way
- shake the basket at about 6 min
- Check
- The outside is deep gold and the cube gives under a fork
- Safety
- Plug an air fryer directly into a wall socket. Do not run one from an extension lead. Full rule below.
Twelve to fourteen minutes at 200°C for 1.5cm cubes.
Fresh
The quick answer
200°C (392°F) for 12–14 min
Cube size, for a published 600g peeled and cut into 1.5cm cubes.
- Assuming
- 600g in total, about 15mm at the thickest point, At room temperature
- In
- Multicooker with air fry
- Loaded
- Single layer, pieces not touching
- Preheat
- Yes, before the food goes in
- Result
- Crisp outside, moist inside
Preparation
Peeled and cut into 1.5cm cubes, tossed in about two tablespoons of oil.
About 30ml 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 6–7 minutes: Shake the basket
Celeriac dries fast and the faces against the basket will scorch before the rest colours.
How to tell it is done
- The outside is deep gold and the cube gives under a fork
- A knife or skewer goes in with no resistance at the thickest point
- The cut faces have browned rather than merely softened
Where these figures came from — fresh
- Applies to
- Specific to this model
- Why this rating
- A published row with a stated quantity, a stated preparation and an oil quantity, from the manufacturer's own guide for this appliance. Quantity is what makes a chart row checkable against the food in front of a reader, and this chart states one for almost every row.
- 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 lidded cooking pot rather than a shallow drawer. Depth affects how much fits in one layer, and the quantity in the chart assumes the crisper basket.
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 celeriac cubes.
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
Celeriac cubes 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 celeriac cubes: fresh. Those are a different question, not a starting point for this one.
What usually goes wrong
Dry and hard rather than soggy, which is unusual for a vegetable here. Celeriac holds much less water than a potato, so the failure mode is burning the outside rather than steaming it.
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 celeriac behaves this way
Celeriac is starchy like a potato but with markedly less water and no fine surface starch, so it dehydrates and browns faster than a potato cube of the same size while never becoming fluffy inside. The result is closer to a roasted chestnut than to a chip. Because there is less water to drive off, it also tolerates crowding better than most vegetables — the failure here is burning rather than steaming, which is the opposite of the usual problem.
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
- Potato cubes — A different cooking problem with a different answer.
- Parsnip cubes — A different cooking problem with a different answer.