Wash the potatoes and pat dry with paper towels (drying is important so they can get crispy). Cut lengthwise into wedges of similar sizes.
In a large bowl, combine the sweet potato wedges, olive oil, and seasonings. Toss to coat.
Arrange the sweet potato wedges in the air fryer basket in a single layer, leaving space between them. (Cook in batches if needed to avoid crowding the basket; mine required 3 batches.)
Cook sweet potatoes in the air fryer at 390 degrees F (199 degrees C) for 15-20 minutes, turning the pieces to a new side every 5-7 minutes, until they are golden, crisp, and fork tender. (If you're in a hurry, you can flip just once or shake the basket halfway through.)
If you like, sprinkle the air fried sweet potatoes with more salt and pepper to taste.
