01 - Preheat air fryer to 400°F for 5 minutes to ensure optimal cooking temperature.
02 - In a shallow bowl, combine flour, baking powder, smoked paprika, garlic powder, and salt. Mix thoroughly to evenly distribute spices.
03 - In a second bowl, whisk together eggs and buttermilk until fully incorporated and smooth.
04 - Place panko breadcrumbs in a third bowl. Arrange bowls in order: flour mixture, egg wash, then panko for efficient dipping.
05 - Separate onion slices into individual rings. Dredge each ring in flour mixture, shaking off excess. Dip in egg mixture, then coat thoroughly with panko breadcrumbs. Press gently to ensure adhesion.
06 - Place breaded onion rings in a single layer in the air fryer basket, ensuring pieces do not overlap. Lightly spray with olive oil.
07 - Air fry in batches at 400°F for 10-12 minutes, flipping halfway through and spraying again with oil. Cook until golden brown and crispy.
08 - Combine mayonnaise, chopped chipotle peppers, lime juice, garlic powder, and salt in a small bowl. Mix until smooth and creamy. Refrigerate until serving.
09 - Serve onion rings immediately while hot and crispy, accompanied by the chipotle mayo for dipping.