Preheat air fryer to 400 degrees Fahrenheit according to air fryer model. (Mine was 400 F for 5 minutes) Cosori 5.8 quart
Wash and dry the potatoes. With a sharp knife cut potatoes into ¼ inch strips lengthwise and each strip into ¼ inch wide strips.
In a large bowl, soak the fries in room temperature water for 15-30 minutes. 9I found that there is not much of a difference if its hot or cold water).
Rinse the potatoes with water again to remove any remaining starch and pat dry them properly.
Toss the fries in oil, and seasonings. Massage the potatoes to ensure they are coated entirely.
Place potatoes into preheated air fryer basket in a single even layer and fry for 20-25 minutes, shaking the basket halfway through a couple of times to ensure even frying. You'll have to do this in batches (3-4 batches depending on air fryer size). Depending on a model, air fryer should let you know when to shake the basket.
If the fries are not as crispy as you'd like, fry them for another 5 or more minutes until they are. Homemade air fryer french fries will look slightly different than when deep frying. It is normal if they are more of a golden brown in some parts. But please don't confuse this with burned fries that were cut too thin and over-fried.
Transfer the hot fries into a large bowl, add more seasoning if needed, parmesan and toss/shake well. Enjoy with your favorite dipping sauces!
While you continue with the rest of the batches, keep the fries warm in the oven spreading them out on a baking sheet (set the temperature at the lowest, not more than 250 F).