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Dried apple slices in an air fryer

Fresh — the short answer

60°C (140°F) for 420–480 min

For
about 3mm at the thickest point
In
Dual-basket air fryer
Published for
Ninja Foodi Dual Zone AF300UK
Preheat
Not needed
Check
The slices are leathery-dry with no cool damp patch in the middle
Moderate confidenceWell supported, but from a narrower base of sources than we would like.

Fresh apple in 3mm slices gets seven to eight hours at 60°C in one manufacturer's chart; two other figures name no state.

Manufacturer figures with no state given — 2 from named machines, listed further down this page.

Fresh

The quick answer

60°C (140°F) for 420–480 min

Published range of seven to eight hours for 3mm slices. The chart prints no amount.

Assuming
about 3mm at the thickest point
In
Dual-basket air fryer
Published for
Ninja Foodi Dual Zone AF300UK
Preheat
Not needed
Result
Cooked but dry
Moderate confidenceWell supported, but from a narrower base of sources than we would like.

Preparation

Core removed, cut in 3mm slices, rinsed in lemon water and patted dry, as the row prints.

How to tell it is done

  • The slices are leathery-dry with no cool damp patch in the middle
  • They crisp as they cool rather than while they are in the machine

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 dehydrating row from the manufacturer's own Quick Start Guide for this machine, under a block headed fresh. The chart has no amount column, so the slice a row prints is the only measure it gives.
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 Fruits & 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 Dual Zone Air Fryer AF300UK — Quick Start Guide and cooking charts

    SharkNinja Operating LLC — Manufacturer cooking chart (United Kingdom)

    Relied on for: The state, amount, temperature and time for apple slices dried.

    States this directly

    Passage read and verified

    Retrieved 2026-10-10 from euronics.a.bigcontent.io

    Retrieved from a retailer's document store, Euronics, which mirrors the manufacturer's booklet. Argos's manual library holds an earlier revision of the same guide, 200515_Mv1, which differs in a few printed amounts; the later revision is the one held here.

Manufacturer figures with no state given

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

  • Breville Halo Rotisserie Air Fryer Oven VDF127: 50°C for 240–300 min

    Published range for a stated 150g on air flow racks. Slice thickness is what moves it, and the chart does not state one.

  • Ninja Foodi MAX Health Grill & Air Fryer AG551UK: 60°C for 360–480 min

    Published range of six to eight hours for 3mm slices. The chart prints no amount.

What usually goes wrong

Leathery rather than crisp, or browned. Both come from the same cause: slices cut unevenly, so the thin ones finish hours before the thick ones. Dehydrating has no way to correct mid-course, which makes the knife work before it starts unusually decisive.

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.

Apple in fast-moving hot air

Dehydrating is the opposite problem from everything else in this catalogue: the objective is to remove water without cooking, which means staying below the temperature at which the cell structure breaks down and the sugars brown. At 50°C an apple slice loses water steadily over hours while staying pale and keeping its shape. The variable is thickness and nothing else — a slice twice as thick takes far more than twice as long, because the water has to migrate to the surface before it can leave.

More on apple

Where to go from here

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