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Celeriac cubes in an air fryer

Fresh — the short answer

200°C (392°F) for 14–16 min

For
600g in total, about 15mm at the thickest point
In
Dual-basket air fryer
Published for
Ninja Foodi MAX Dual Zone AF400UK
Preheat
Not needed
Part way
shake the basket at about 7 min
Check
The outside is deep gold and the cube gives under a fork
Moderate confidenceWell supported, but from a narrower base of sources than we would like.

Fresh celeriac in 1.5cm cubes gets fourteen to sixteen minutes at 200°C in one manufacturer's chart; its chart for another machine names no state.

Manufacturer figures with no state given — 1 from a named machine, listed further down this page.

Fresh

The quick answer

200°C (392°F) for 14–16 min

Published range for 600g cut into 1.5cm cubes.

Assuming
600g in total, about 15mm at the thickest point
In
Dual-basket air fryer
Published for
Ninja Foodi MAX Dual Zone AF400UK
Preheat
Not needed
Result
Crisp outside, moist inside
Moderate confidenceWell supported, but from a narrower base of sources than we would like.

Preparation

Peeled and cut into 1.5cm cubes, as the row prints. Its preparation says two tablespoons of oil and its oil column says one, so no amount of oil is held.

While it cooks

  1. At about 7–8 minutes: Shake the basket

    The chart tells the owner to shake or toss often unless the preparation column says otherwise. It prints that beside the whole chart, not against this row, and gives no moments for it.

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

Moderate confidenceWell supported, but from a narrower base of sources than we would like.
Applies to
Specific to this model
Why this rating
A published row from the manufacturer's own Quick Start Guide for this machine, under a block whose heading names the state. It is held as the chart prints it: its amount, its preparation and its oil where it gives them, and nothing where it does not.
Last reviewed
2026-10-10

What this does not cover

  • Published by the manufacturer for this model. It is evidence about this appliance and is not general advice.
  • This machine has two drawers. The chart prints one amount for the row and does not say which drawer it is for, or whether it is for one drawer or both.
  • The chart heads this block Fresh Vegetables, and the row is held as fresh on that heading. The word is the block's and not the row's own.
Sources (1)

  • Ninja Foodi MAX Dual Zone Air Fryer AF400UK — Quick Start Guide and cooking charts (PDF)

    SharkNinja Operating LLC — Manufacturer cooking chart (United Kingdom)

    Relied on for: The state, amount, temperature and time for celeriac cubes.

    States this directly

    Passage read and verified

    Retrieved 2026-10-10 from argos-support.co.uk

    Retrieved from Argos's manual library for Argos product 952/3997, published there alongside the instruction booklet as the product's quick start guide.

Chilled

Cooked as fresh: use the fresh figures above. Raw food sold chilled is the fresh state under another name, and the charts those figures come from start from fridge-cold.

Manufacturer figures with no state given

This is a published figure for one named machine. The manufacturer does not say whether this is fresh or frozen. So it is kept apart from the figures above, and not used as the answer for any of them.

  • Ninja Foodi MAX Health Grill & Air Fryer AG551UK: 200°C for 12–14 min

    Published range for 600g cut into 1.5cm cubes.

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

The rules for the machine are the same whatever is in it: plug it straight into a wall socket, leave clear space round it, do not overfill it, do not leave it running unattended, and unplug it at black smoke or an electrical smell. They are set out once, each with its source and what to do if it has already happened, and not repeated on every food. Every rule for running an air fryer safely.

Celeriac in fast-moving hot air

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.

More on celeriac

Where to go from here

The pages that answer the questions this one tends to raise.

Easily confused with

  • Potato cubes — A different cooking problem with a different answer.
  • Parsnip cubes — A different cooking problem with a different answer.