Air Fryer French Fries: Homemade vs Frozen (Full Guide)
French fries were the first thing I ever cooked in an air fryer. Frozen chips from a bag, into the Ninja, done in 14 minutes. They came out properly crispy in a way I hadn't expected — not baked-potato-pale like the oven version, actually golden.
That was enough to sell me on the appliance entirely. Here's everything you need to know, whether you're starting from a frozen bag or cutting your own.
Frozen French Fries
The easiest version, and the one most people start with.
| Type | Temp (°F) | Temp (°C) | Time | Notes |
|---|---|---|---|---|
| Thin frozen fries (straight-cut) | 400°F | 200°C | 12–15 min | Shake at 6 min |
| Thick-cut frozen fries | 400°F | 200°C | 15–18 min | Shake at 8 min |
| Crinkle-cut | 400°F | 200°C | 14–16 min | Shake halfway |
| Steak fries (thick-cut frozen) | 400°F | 200°C | 18–22 min | Shake twice |
| Waffle fries | 400°F | 200°C | 10–12 min | Shake halfway |
| Sweet potato fries (frozen) | 400°F | 200°C | 15–18 min | Shake halfway |
No thawing needed. Straight from the freezer into a preheated air fryer. Don't add oil — frozen fries already have oil on them. Adding more makes them greasy rather than crispy.
Don't stack. The most common mistake with frozen fries. They need to be in a single layer, not piled three inches deep. If you have more than fits, do two batches — the second batch cooks in the same time as the first because the machine is already hot.
The times above are based on a standard 5–6 quart air fryer at full preheat. If yours runs cooler, add 2 minutes and check. If you have a smaller machine, reduce slightly.
Homemade Fries From Scratch
More work than frozen, but the result is different — starchier, more potato flavour, softer inside. Worth doing occasionally.
Ingredients (for 2 servings)
- 2 medium russet potatoes (floury variety works best)
- 1–2 tsp neutral oil (vegetable, sunflower, or light olive oil)
- Salt
- Optional: garlic powder, smoked paprika, dried rosemary
Step 1: Cut
Peel or leave skin on — personal preference. Cut into sticks about ½ inch wide and as uniform as you can manage. Thinner than ½ inch and they'll crisp but won't have much interior. Thicker and they take longer and can stay starchy inside.
Step 2: Soak in cold water
This is the step most guides mention and most people skip. Don't skip it. Submerge the cut fries in cold water for at least 30 minutes (up to 2 hours in the fridge). This removes surface starch, which is what causes fries to stick together and go gummy rather than crispy. After soaking, drain and pat completely dry with kitchen paper. Dry is essential — surface moisture becomes steam, which prevents crisping.
Step 3: Season and oil
In a bowl, toss the dried fries with the oil and salt. Coat evenly. A teaspoon of oil per medium potato is enough — you want a light film, not a drench.
Step 4: First cook — low temperature
Set the air fryer to 320°F / 160°C and cook for 12–15 minutes, shaking every 5 minutes. This low-temperature first cook builds the interior — it softens the fry and cooks it through without crisping the exterior yet. They'll look pale and slightly underdone at the end of this stage. That's correct.
Step 5: Second cook — high temperature
Increase to 400°F / 200°C. Cook for 8–12 minutes, shaking every 3–4 minutes, until the fries are golden and crispy on the outside. Watch them in the last few minutes — they go from golden to burned faster than expected.
Total time: 20–27 minutes plus soaking time. Longer than frozen, but worth it.
Why the two-temperature method?
A single high-temperature cook on fresh fries results in an overcooked exterior before the inside is fully cooked. The low-temperature first stage is essentially blanching — it builds the interior structure. The high-temperature second stage is the crisping step. This is how restaurants do it in oil (blanch at 325°F, finish at 375°F), and the same principle applies.
Getting Crispy Fries: The Key Factors
- Single layer. Every fry should have space around it. Touching fries steam each other.
- Dry before cooking. For fresh fries especially — pat dry after soaking. Surface moisture is the enemy of crispiness.
- Preheat the air fryer. Put fries into a hot machine from the start.
- Don't add oil to frozen fries. They already have it. Extra oil makes them greasy.
- Shake regularly. More frequently than the recipe says if you're watching closely — every 3–4 minutes keeps them cooking evenly.
- Russet or floury potatoes for homemade. Waxy potatoes (like new potatoes) don't crisp the same way. Russets or Maris Piper (UK) have higher starch content which is what you want.
Seasoning Ideas
- Classic: Salt. That's it. Let the potato flavour come through.
- Garlic parmesan: Toss with garlic powder before cooking. As soon as they come out, toss with finely grated Parmesan and a handful of fresh parsley.
- Smoky: Smoked paprika and garlic powder before cooking, salt after.
- Cajun: Smoked paprika, cayenne, garlic powder, onion powder, dried thyme — coat before cooking.
- Salt and vinegar: Toss with a light spray of malt vinegar as soon as they come out (not before — vinegar before cooking makes them soggy).
Frequently Asked Questions
Why are my air fryer fries not crispy?
Almost always: overcrowded basket, not dry enough, or no preheat. Fix one of those and it usually resolves.
Can I reheat fries in an air fryer?
Yes — and better than any other reheating method. 375°F / 190°C for 3–4 minutes. They come back to genuinely crispy rather than soggy microwave fries.
Do I need to soak fresh fries?
Yes, for the best result. Even 20 minutes in cold water is better than nothing.
Can I make sweet potato fries from scratch?
Yes — the same method works. Sweet potatoes have lower starch content so they won't get quite as crispy, but they come out well. Skip the water soak (not necessary for sweet potatoes) and cook at 400°F / 200°C for 15–18 minutes, shaking halfway.