How to make sweet potato fries in the air fryer Cut the sweet potato. Rinse the sweet potato and pat it dry with paper towels, getting it as dry as possible. Don’t overcrowd the basket. For the best air fryer sweet potato fries, you’ll need a Sweet potato, Avocado oil, Salt, Pepper, Onion powder, Garlic powder, Smoked paprika, and Tapioca flour or Cornstarch. Repeat with remaining sweet potatoes. One small sweet potato will fit perfect but if it’s slightly larger, do them … I Made It Print Place an even layer of sweet potatoes in the fry basket, insert in the air fryer, and cook until golden, about 10 minutes.