Preheat your air fryer to 350°F for 3 minutes. Place the frozen onion rings into the air fryer basket. You can stack them, but only about halfway up the basket to ensure even cooking.

Cook at 350°F for 5 minutes.

Open the air fryer, turn the onion rings to ensure even crisping.

Increase the temperature to 400°F and cook for an additional 6-8 minutes, or until golden brown and crispy to your liking.