1. Preheat the Air Fryer (and Show Restraint)
First, preheat the fryer to 350°F. While you’re probably extremely excited to see how these bad boys turn out, grab only a handful at a time and spread them out in the basket of the air fryer. This guarantees they’ll reheat evenly.
2. Watch Them Closely
Air fryers work fast, so you’ll want to stay right where you are for the full cooking time: 3 to 4 minutes. (Make sure you pause the time and shake the basket halfway through cooking to make sure the fries aren’t sticking to each other.)
That’s it! In a matter of minutes, your fries will have gone from sad residents of your fridge to a reheated side that we bet you could pass off as freshly cooked. Indulge once more!