Cut your potatoes thick and soak them first

The best air fryer fries start with the right cut and a soak. Cut your potatoes into fries about a quarter-inch thick — thicker than fast-food fries but not thick-cut steak fries. Thinner fries dry out and burn; thicker ones stay soft inside.

After cutting, soak the fries in cold water for at least 30 minutes, or up to 2 hours. This removes surface starch, which is what makes fries soggy. Pat them completely dry with a clean kitchen towel or paper towels before seasoning — any moisture left on the surface will steam instead of crisp.

Use russet potatoes if you can find them. They have less moisture than red or waxy potatoes and crisp up better in the dry heat of an air fryer.

Key Takeaways

  • Soak cut fries in cold water for 30 minutes to 2 hours, then dry them completely before cooking.
  • Toss fries with a small amount of oil — about 1 tablespoon per pound of potatoes — to get them crispy without greasiness.
  • Cook at 400°F for 15 to 20 minutes, shaking the basket halfway through so all sides brown evenly.
  • Season after cooking rather than before, so salt and spices stick to the oil instead of falling off.

Use oil, but use it sparingly

Air fryers need some oil to crisp fries, but not much. Toss your dried fries with about 1 tablespoon of oil per pound of potatoes. Use a neutral oil with a high smoke point — vegetable, canola, or peanut oil all work. Olive oil burns at air fryer temperatures and will taste bitter.

The oil is what browns the outside and makes fries crispy. Without it, you get pale, chewy fries. Too much oil and they come out greasy. One tablespoon per pound is the balance point. Toss the fries in a bowl with the oil and a pinch of salt, making sure every piece is lightly coated.

Cook at 400°F and shake halfway through

Set your air fryer to 400°F. This temperature is hot enough to brown the outside while the inside stays tender. Spread the fries in a single layer in the basket — do not crowd them. If your basket is small, cook in two batches rather than piling fries on top of each other.

Cook for 15 to 20 minutes, depending on how thick you cut them and how full your basket is. At the 8-minute mark, shake the basket or flip the fries so they brown evenly on all sides. Check them at 15 minutes; if they are not golden brown yet, give them another 3 to 5 minutes.

Different air fryer models run at slightly different temperatures, so the first time you make fries, check them at 15 minutes and adjust the time up or down for your machine. Once you know your fryer, you will hit the timing consistently.

Season after cooking, not before

Season your fries right after they come out of the air fryer, while they are still hot and slightly damp. Salt and spices stick to the oil on the surface much better than they do to raw potatoes. If you season before cooking, most of the seasoning falls off into the basket.

For plain salted fries, use fine sea salt or kosher salt and sprinkle it on while the fries are still steaming. For flavored fries, toss them in a bowl with your seasonings — garlic powder, paprika, cayenne, dried herbs, or parmesan all work well. The heat helps the flavors stick and bloom.

Avoid common mistakes that make fries soggy

The most common mistake is not soaking the potatoes. Starch on the surface traps moisture, and moisture turns fries soggy no matter how hot the air fryer gets. Soak and dry, and you solve half the problem.

The second mistake is overcrowding the basket. Air fryers work by circulating very hot air around the food. If fries are piled on top of each other, the ones on the bottom steam instead of fry. Cook in batches if you need to.

The third mistake is not shaking the basket. Fries that sit in one spot brown unevenly — some sides get dark while others stay pale and soft. Shake at the halfway point and you get even browning all around.

Storing and reheating leftover fries

Air fryer fries are best eaten right away, but leftovers keep in an airtight container in the refrigerator for up to 3 days. To reheat, put them back in the air fryer at 350°F for 3 to 5 minutes. This restores the crisp without drying them out further. Do not microwave them — microwaves steam fries and make them soggy.

If you want to make fries ahead, cut and soak them the night before, then store them in the refrigerator in a container of cold water. Drain and dry them just before cooking. This saves time on the day you want to eat them.

Frequently Asked Questions

Do I have to soak the potatoes?

Soaking removes starch that traps moisture and makes fries soggy. You can skip it, but your fries will be less crispy. If you are in a hurry, even a 15-minute soak helps. The longer you soak, the crispier the result.

Can I use frozen fries in an air fryer?

Yes. Frozen fries cook at 400°F for 12 to 15 minutes, shaking halfway through. They are already blanched and dried at the factory, so they crisp up quickly. They will not be quite as crispy as fresh fries, but they are faster and still much better than oven-baked.

What oil is best for air fryer fries?

Use vegetable, canola, or peanut oil. These have high smoke points and neutral flavor. Olive oil burns and tastes bitter. Butter burns too. Avoid coconut oil unless you want coconut-flavored fries.

Why are my fries still soft after cooking?

Either you did not dry them well enough after soaking, you used too much oil, or you crowded the basket. Check all three: make sure fries are bone-dry before cooking, use only about 1 tablespoon of oil per pound, and leave space between fries so air can circulate.

Can I season fries before cooking?

You can, but most of the seasoning falls off into the basket. Seasoning after cooking, while fries are hot and slightly damp, makes flavors stick much better. If you want to season before, use a light hand and plan to season again after cooking.