01 - Preheat your air fryer to 400°F for 5 minutes to ensure optimal crisping.
02 - Separate onion slices into individual rings and set aside.
03 - Prepare three shallow bowls: Bowl 1 with flour, garlic powder, smoked paprika, salt, and black pepper mixed together; Bowl 2 with whisked eggs and milk; Bowl 3 with panko breadcrumbs.
04 - Dredge each onion ring in the flour mixture, shaking off excess. Dip into the egg mixture, then coat thoroughly with panko breadcrumbs. Press gently to help the coating adhere.
05 - Place coated onion rings in a single layer in the air fryer basket. Work in batches if necessary. Lightly spray the tops with cooking spray.
06 - Air fry for 10–12 minutes, flipping halfway through cooking, until golden brown and crispy.
07 - While onion rings cook, combine mayonnaise, chipotle pepper, adobo sauce, lime juice, and salt in a small bowl. Mix well and adjust seasoning to taste.
08 - Serve hot onion rings immediately with chipotle mayo for dipping.