French fries in an air fryer need a higher temperature and a mid-cook shake to achieve that crispy exterior everyone wants. So how long should you cook french fries in an air fryer? For most store-bought frozen fries, the answer is 14 to 18 minutes at 380°F to 400°F, with a good shake halfway through.
Fresh-cut homemade fries take a bit longer, usually 20 to 25 minutes, because they hold more moisture. The exact time depends on the thickness of the fries, the model of your air fryer, and whether you pre-soak them.
Below you will find a complete guide with times, temperatures, and simple steps that work every time.
How Long Should You Cook French Fries In An Air Fryer
This is the core question, and the honest answer is: it depends on the type of fry. A thin shoestring fry cooks much faster then a thick steak cut. Your air fryer brand also matters, since some run hotter then others.
Use the chart below as your starting point, then adjust by a minute or two based on what you see.
Quick Time And Temperature Chart
- Frozen shoestring fries: 12 to 14 minutes at 400°F
- Frozen crinkle cut fries: 15 to 18 minutes at 400°F
- Frozen steak cut fries: 18 to 22 minutes at 380°F
- Frozen curly fries: 14 to 16 minutes at 390°F
- Homemade thin fries: 18 to 20 minutes at 380°F
- Homemade thick fries: 22 to 25 minutes at 375°F
- Waffle fries: 14 to 17 minutes at 400°F
Always shake the basket at the halfway mark. This single step is the difference between soggy fries and crispy ones.
Why The Halfway Shake Matters
Air fryers blow hot air from the top. The fries touching the top get crisp fast, while the ones sitting at the bottom steam in their own moisture. If you skip the shake, you get uneven results.
Pull the basket out, give it a firm shake, and slide it back in. Do this once at the halfway point. For larger batches, shake two or three times.
Frozen Fries Vs Homemade Fries
Frozen fries are partly cooked and coated with a light starch layer before freezing. That coating helps them brown quickly. This is why they need less time.
Homemade fries are raw. They carry a lot of water inside, and water is the enemy of crispiness. You need to remove that moisture before the fries can brown properly.
How To Prep Homemade Fries
- Cut your potatoes into even strips, about 1/4 to 1/2 inch thick.
- Soak them in cold water for 30 minutes. This pulls out extra starch.
- Drain and pat them completely dry with a clean towel.
- Toss with one tablespoon of oil and a pinch of salt.
- Place them in the basket in a single layer. Do not crowd them.
- Cook at 380°F for 20 to 25 minutes, shaking every 8 minutes.
Even thickness is key. If some fries are thin and others are thick, the thin ones will burn before the thick ones cook through.
Temperature Settings That Work Best
Most frozen fries do well between 380°F and 400°F. Going lower then 375°F tends to dry the fries out before they brown. Going above 400°F can burn the outside while the inside stays cold.
If your air fryer tends to run hot, drop the temp by 10 degrees and add two minutes to the cook time. Check your manual for the max temperature setting.
Common Mistakes To Avoid
- Overfilling the basket. Fries need space for air to move around them.
- Skipping the oil on homemade fries. A little oil helps browning and flavor.
- Not drying the potatoes. Wet fries steam instead of crisp.
- Shaking too late. Shake at the halfway point, not at the end.
- Using the wrong cut. Thick fries need more time and a lower temp.
Another common slip is adding salt before cooking. Salt draws out moisture. For the crispiest results, salt right after the fries come out of the basket.
Do You Need To Preheat Your Air Fryer
Some models need a 3-minute preheat, others do not. Check your manual. If your fries often come out pale, try preheating for 3 to 5 minutes at the cooking temp. It gives them a faster start.
Preheating is not required, but it does help with even browning, espcially on smaller air fryers.
How To Tell When Fries Are Done
Look for a deep golden color and a firm, crisp surface. Pick one up with tongs. If it bends and flops, it needs more time. If it holds its shape and sounds slightly hard when tapped, it is ready.
You can also test the inside. A done fry is fluffy inside with no raw, starchy taste. If the center still tastes like potato starch, add 3 more minutes.
Keeping Fries Crispy After Cooking
Do not pile them on a plate right away. The steam trapped under them will soften the crust. Instead, spread them on a wire rack or a paper towel lined tray in a single layer.
If you need to hold them for a few minutes, keep them in a warm oven at 200°F. Never cover them with foil, as that traps moisture.
Adjusting For Your Air Fryer Model
Basket air fryers and oven-style air fryers cook differently. Basket models with a strong fan crisp faster. Oven-style units often need a few extra minutes and a shake on the rack instead of the basket.
Small 2-quart fryers hold less food, so cook in batches. A crowded basket is the number one reason fries turn out soft. When in doubt, cook fewer fries and add two minutes to the timer.
A Simple Rule To Remember
Set your air fryer to 400°F for frozen fries and 380°F for homemade. Start with 15 minutes. Shake at the 7 or 8 minute mark. Then check every 2 minutes until they look right.
After two or three batches, you will know exactly how your machine behaves. Every air fryer has its own personality, and yours may run a bit fast or a bit slow.
Once you dial in the time and temp, you get fries that are crisp outside, fluffy inside, and ready in under 20 minutes with almost no oil. That is the whole point of cooking them this way.