Kale crisps in an air fryer
Fresh — the short answer
150°C (302°F) for 8 min
- For
- 100g in total
- In
- Dual-basket air fryer
- Published for
- Ninja Foodi Dual Zone AF300UK
- Preheat
- Not needed
- Part way
- shake the basket at about 4 min
- Check
- The leaves shatter rather than bend
Fresh kale for crisps gets eight to nine minutes at 150°C with no oil in one manufacturer's charts for two machines.
Manufacturer figures with no state given — 1 from a named machine, listed further down this page.
Fresh
The quick answer
150°C (302°F) for 8 min
A single published time for 100g of kale, which the row says is for crisps, not a range.
- Assuming
- 100g in total
- In
- Dual-basket air fryer
- Published for
- Ninja Foodi Dual Zone AF300UK
- Preheat
- Not needed
- Result
- Crisp throughout
Preparation
Torn in pieces with the stems removed, with no oil, as the row prints.
No oil needed.
While it cooks
At about 4 minutes: Shake the basket
The chart tells the owner to shake or toss the food often, and recommends shaking at least twice during the cooking cycle. It prints that beside the whole chart, not against this row, and gives no moments for it.
How to tell it is done
- The leaves shatter rather than bend
- Still green, with no black frilled edges
Other figures for this state
Ninja Foodi MAX Dual Zone AF400UK — dual-basket air fryer: 150°C for 9 min
A single published time for 225g of kale, which the row says is for chips, not a range.
Where these figures came from — fresh
- 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 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 kale crisps.
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.
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: 150°C for 10–12 min
Published range for 400g of kale, which the row says is for crisps.
What usually goes wrong
Black bitter frills round a limp middle, from cooking them at the temperature everything else in the basket wants. Kale is also light enough to be blown into the element, which is a fire question rather than a cooking one.
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.
Kale in fast-moving hot air
A kale leaf is a few cells thick with an enormous surface area for its mass and almost no thermal buffer. At 200°C the edges reach the temperature at which the leaf's sugars and proteins scorch long before the middle of the leaf has dried, so the result is bitter black frills around a limp centre. At 150°C the water leaves slowly enough that the whole leaf dries at roughly the same rate and becomes brittle rather than burnt. It is dehydration with a bit of browning, not roasting, and the time on the chart is what drying takes. It is also light enough to be picked up and blown around by the fan.
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.
If it went wrong
What tends to go wrong with kale crisps, each with the fastest thing to check first.
- Light food is being blown around inside — A cooking nuisance and a fire risk in the same symptom, because what the fan lifts it lifts into the element.