The best way to reheat your apple fritters is in the oven or air fryer. Preheat your air fryer to 400°, heat your apple fritters for 2 minutes, and voila! Expert Tip: Never microwave an air fryer apple fritter to warm it up. It will turn out soggy and chewy every time. It's well worth it to take the extra few minutes and warm them up in the air fryer!