My air fryer sat on the counter for two months making vaguely warm potato sticks before I figured out the actual secret to crunch. If you’re asking how do I make crispy french fries in an air fryer, the answer isn’t more oil or a hotter setting — it’s water management. Get the starch and surface moisture under control and the air fryer does the rest beautifully.
I’ve tested russets against Yukon Golds, soaked against unsoaked, single versus double cook — probably forty batches at this point. The method below gives me fries that genuinely shatter when you bite them, with fluffy middles, in about 25 minutes. No deep fryer, no vat of oil, no regrets.
How do I make crispy french fries in an air fryer: The Short Answer
For crispy air fryer french fries: cut russet potatoes into 1/4-inch sticks, soak in cold water for 30 minutes, dry them thoroughly, toss with 1 tablespoon of oil and salt, then air fry at 400°F for 20–25 minutes, shaking the basket every 5–7 minutes. Don’t overcrowd — cook in batches. The soak removes excess starch, thorough drying prevents steaming, and regular shaking ensures even browning.
Why This Matters More Than You Think
Crispiness is really about dehydration. A french fry gets crispy when its surface dries out and the starches gelatinize then crisp in hot oil — and an air fryer is basically a small, fierce convection oven that excels at exactly this. Serious Eats’ tested fry methods The enemy is surface moisture: wet potato surfaces steam instead of crisping, which is why the soak-and-dry steps matter more than any seasoning trick. Starch is the second factor — rinsing away surface starch prevents gummy exteriors and lets a proper crust form.
5 Tips That Actually Work
Soak the cut potatoes for 30 minutes
Cold water pulls excess starch off the cut surfaces — you’ll see the water turn cloudy. This is the difference between fries with a papery crisp shell and ones that taste gummy. Thirty minutes is the sweet spot; an hour is fine too, but don’t skip it entirely.
Dry them like you mean it
After soaking, drain and spread the fries on a clean kitchen towel, then pat completely dry — then let them air-dry 10 more minutes if you can. Any surface water turns to steam in the fryer and sabotages crisping. This step is boring and absolutely essential.
Use russets and cut them thin
Russet potatoes have the high starch and low moisture that fries need. Cut 1/4-inch sticks — thinner fries get crisper in an air fryer than steak-cut ones, which can stay soggy in the middle. Yukon Golds work but come out creamier and less shattery.
One tablespoon of oil is plenty
Toss the dried fries with just a tablespoon of high-smoke-point oil (avocado or light olive) per two potatoes. The air fryer’s circulating heat does the crisping work; excess oil just pools and makes fries greasy. Season with salt after cooking, not before — salt draws out moisture.
Shake, shake, and cook in batches
Shake the basket every 5–7 minutes so all sides meet the hot air. And don’t fill the basket more than a single layer deep — overcrowding is the number-one reason air fryer fries disappoint. Two potatoes might need two batches; it’s worth the extra 12 minutes.
My Favorite Tools and Brands
I only recommend gear I’ve actually used or that’s widely vetted by testing labs — Consumer Reports’ air fryer ratings is worth checking before you buy.
- Cosori 5.8-qt air fryer — ~$120 — The most popular model for a reason: even heating and a big basket.
- Crinkle cutter or sharp chef’s knife — ~$12 — Uniform cuts cook evenly; a mandoline with a fry blade works too.
- Large mixing bowl — ~$15 — For soaking and tossing without making a mess.
- Parchment liners for air fryer — ~$8 — Optional, but they make cleanup nearly zero-effort.
Common Mistakes to Avoid
- Skipping the soak. Unsoaked fries taste fine but never reach true crispiness. The starch has to go.
- Filling the basket to the top. A packed basket steams. Single layer, always — cook in batches.
- Salting before cooking. Salt pulls moisture to the surface, working against the crisp you’re building. Salt the moment they come out instead.
- Opening the basket constantly. Every open drops the temperature. Stick to shaking every 5–7 minutes, not every two.
Frequently Asked Questions
Can I use frozen fries in the air fryer?
Absolutely — and they’re engineered for it. Cook frozen fries at 400°F for 15–18 minutes, shaking twice. They won’t beat fresh-soaked russets, but brands like Alexia and Ore-Ida get impressively crispy with zero prep.
Why are my air fryer fries soggy in the middle?
Usually the cuts are too thick or the basket is overcrowded. Cut thinner (1/4 inch), keep a single layer, and make sure potatoes are bone-dry before oiling. Steak fries just don’t crisp as well in an air fryer.
Do I need to preheat the air fryer?
Yes — 3–5 minutes at 400°F. Starting in a hot basket sears the exterior immediately instead of letting the fries sit and steam as the fryer heats up.
The Double-Cook Upgrade
If you want fries that rival a restaurant, try the double-cook method: air fry at 360°F for 15 minutes until soft and pale, pull them out and let them cool 10 minutes (or refrigerate up to a day), then finish at 400°F for 8–10 minutes until deeply golden. The rest between cooks lets the interior set and the surface dry completely, so the final blast creates an extra-shattering crust. It’s more effort, but for a dinner-party side, it’s worth it.
Soak, dry thoroughly, cut thin, oil lightly, cook in batches at 400°F with regular shaking — that’s the whole formula for shatteringly crispy air fryer fries. Once you’ve nailed the technique, try it on healthy snacks to keep at my desk, and round out the meal with cook salmon so it stays juicy or make homemade ice cream without a machine. Your deep fryer won’t be missed.
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