Air Fryer Zucchini
Temperature
375°F
190°C
Time
10 min
1 zucchini
Heat through to
Piping hot
cooked right through
Prep
5 min
Cook
10 min
Total
15 min
Zucchini tends to go to mush in the oven from all its water, but the air fryer's direct heat dries it off and browns the edges instead. The trick is not to crowd the basket, so the steam can escape.
Ingredients
Quantities for 1 zucchini - the times on this page assume that much in the basket.
- 1 zucchini, sliced into coins
- 1 tsp olive oil
- 1 tsp dried oregano
- Zest of 1/2 lemon
- Salt and black pepper
- Grated parmesan, to finish
How to air fry zucchini
- Slice the zucchini into even coins and toss with the oil, oregano, lemon zest, salt and pepper. The parmesan goes on as they come out - added early it just scorches.
- Preheat the air fryer to 375°F (190°C).
- Add the fresh zucchini to the basket. Keep the coins in a single layer.
- Cook for about 10 minutes, turning the coins halfway through.
Pro tip
Slice into coins for even cooking.
How to tell when it's done
It's ready when the slices are tender and golden at the edges but still holding their shape. Get it out promptly - left too long it goes soft and floppy.
Air fryer zucchini chips: the trouble is not the water, it is what is left when the water goes
The recipe on this page is coins at 375°F (190°C) for 10 minutes, and it finishes tender with browned edges - good, but not a chip. Chips are a different job, and it is worth being straight about the ceiling before you start. Slice thin, salt and dry the slices, cook them lower and longer than these coins, and you will get a long way. You will not get the flat snap of a potato chip, and no technique closes that gap. The reason is not the one every other page gives you.
Zucchini is about 95% water by weight. That figure gets quoted everywhere as the whole explanation, and it is only half of one. Turn it round: if 95% is water, then roughly 5% is everything else, and that 5% is all you have to build a chip out of once the water has gone. A potato cut for chipping runs 20-23% dry matter, and 65-80% of that dry matter is starch - the thing that gelatinizes as it cooks and then sets into the rigid, glassy structure you hear when you bite a crisp. Zucchini has essentially no starch at all. So the problem was never that zucchini holds too much water to drive off. It is that when you do drive the water off, there is almost nothing left behind to hold a shape, which is why a slice pushed too far goes leathery and shriveled rather than brittle. The water is what you remove; the dry matter is what you get to keep, and zucchini gives you very little of it.
This is also why chips crisp in the basket and soften on the plate within minutes, and why the usual explanation for that is wrong. Recipes tend to say they are reabsorbing moisture from the air. That is genuinely how a potato chip goes stale - but only because a potato chip is fried until it is crust the whole way through, with no wet middle left inside it, so the air is the only water available to it. A zucchini slice is nothing like that. Its surface browns long before its interior is anywhere near dry, so what leaves the basket is a thin dried shell wrapped around a middle that is still mostly water. Off the heat, that water moves outward into the dried layer and softens it from behind. It is the mechanism that turns yesterday's bread crust leathery, not the one that flattens a chip left open in the packet, and it runs in minutes rather than hours because the distance is so short. Which points at a different fix from 'serve them immediately': slice thinner, so there is both less water held behind the shell and less distance for it to cross, and give the slice a scaffold it does not own - the cornstarch this site already reaches for on sweet potato fries and tofu, or the parmesan and breadcrumb coatings that chip recipes use without ever saying what they are for.
Converting from an oven recipe
If your recipe is written for a conventional oven, lower the temperature by about 25°F (15°C) and reduce the time by roughly 20% to land near 375°F for 10 minutes. Need a different starting point? Use the conversion calculator.
Air fryer zucchini: FAQ
Why does this recipe add the parmesan at the end when zucchini chip recipes put it on first?
Because the two are asking it to do different jobs. Here it is a seasoning. These coins are going to finish tender rather than crisp, so the parmesan is there for flavor and it goes on as they come out - put it in the basket for 10 minutes at 375°F and it scorches, because grated parmesan is thin, low in moisture and full of milk sugars, so it browns and then burns well before the zucchini underneath is ready. On a chip recipe the same parmesan is structural. Zucchini has no starch of its own to set into a crisp layer, so the cheese stands in as the scaffold the vegetable cannot provide: it melts, drives off its own water and sets into a rigid sheet, and the slice reads as crisp because the cheese is. That only works if it is on the slice from the start. So the rule is not that parmesan goes on last - it goes on last when it is a garnish and first when it is the structure, and if you put it on first, watch it, because it will take color a long time before a slice of zucchini has given up its water.
How long does it take to air fry zucchini?
Air fry zucchini at 375°F (190°C) for about 10 minutes, turning the coins halfway through. That's for 1 zucchini in a single layer; adjust slightly for a fuller basket or a different model.
What temperature do you air fry zucchini at?
Set the air fryer to 375°F (190°C). If you're converting an oven recipe, that's roughly 25°F (15°C) below the oven temperature, with the time cut by about 20%.
Do I need to preheat the air fryer for zucchini?
A 2-3 minute preheat gives the most accurate timing and the best browning, but it isn't essential - if you skip it, add a minute or two to the cook time.