Air Fryer Sweet Potato Fries

Crispy on the edges, soft in the middle, and a little sweet and savory — air fryer sweet potato fries beat the oven every time, with a fraction of the oil. The hot circulating air gives you that fast-food crunch without the deep fryer.
A touch of rosemary and Parmesan takes them from side dish to the thing everyone fights over. They come together in under 30 minutes and pair with just about anything.
Ingredients
Instructions
Cut evenly
Cut the sweet potatoes into even sticks, about ¼-inch thick, so they cook at the same rate.
Season
In a bowl, toss the fries with the olive oil, rosemary and salt until lightly coated.
Air fry
Arrange in a single layer (work in batches if needed) and air fry at 400°F for 15–18 minutes, shaking the basket halfway through, until golden and crisp.
Finish
Transfer to a bowl and toss with the Parmesan while still hot.
- Don't crowd the basket — a single layer is the difference between crispy and soggy.
- For extra crunch, toss the raw fries with 1 tsp cornstarch before the oil.
- Soaking the cut fries in cold water for 20 minutes removes starch and helps them crisp.
Frequently asked
How long do sweet potato fries take in the air fryer?
About 15–18 minutes at 400°F, shaking halfway. Thicker cuts take a little longer.
Why aren't my sweet potato fries crispy?
Usually the basket is too crowded or the fries are cut too thick. Cook in a single layer and keep them around ¼-inch thick — a little cornstarch helps too.
Do I need to soak sweet potato fries?
It's optional, but a 20-minute cold-water soak removes surface starch and gives you crispier fries.

