Lay down your FROZEN French Fries in the Air Fryer Basket. How to Make French Fries in Air Fryer. Spray your air fryer basket with olive oil spray. Cut and soak fries for 30 minutes (PRO TIP: add a little granulated sugar to the water for a slightly sweet flavor- lots of fast-food restaurants do this).Drain fries and pat dry with a paper towel. Then spray them with olive oil spray. Start by preheating your air fryer. Right now, you can save 18 percent on the 4.4-star-rated GoWISE 15-in-1 air fryer, which is the perfect way to cook everything from crispy French fries to salmon, all without the excess oils. If you do not have a preheating setting on your air fryer, run it for 5 minutes at 400 degrees F, air fryer setting. Air Fryer french fries are super easy to make and ready in no time for a perfect snack!