Preheat the air fryer to 375ºF, then slice the potatoes into french fry shapes, about 1/4-inch thick. Place the raw potato slices in a bowl of warm water and let them rest for 10 minutes.
Drain the potatoes, pat dry, and place them in a large bowl. Drizzle them with the olive oil, then season with the salt and garlic powder. Toss well to coat the potatoes.
Arrange the seasoned potato slices on the bottom of your air fryer basket, in a single layer, if possible. (I have to do this in 2 batches with my basket-style air fryer.) The more separated the potatoes, the crispier they will be.
Cook the fries at 375ºF for 10 minutes, then shake the basket to help them cook evenly. Return the basket to the air fryer to cook for 5 more minutes, or until the fries are golden and crisp.
Serve warm right away, as the fries will get softer as they cool. If you ever need to reheat the fries, most air fryers have a 4-minute "reheat" button that will help them crisp up again!
Nutrition information is per 4 oz. of potatoes, but this is just an estimate and not a guaranteeI like using Yukon Gold potatoes best for french fries, as they have a "creamier" middle. Russet potatoes are drier in texture. If you want to make sweet potato fries, see my Air Fryer Sweet Potato French Fries tutorial instead.