01 -
Peel the onion and slice it into 1/2-inch rounds. Separate into rings and pat dry with paper towels.
02 -
In a shallow bowl, stir together the flour, 1/2 teaspoon salt, smoked paprika, garlic powder, and black pepper.
03 -
In a second shallow bowl, whisk the eggs with the buttermilk until smooth. Put the panko and remaining 1/2 teaspoon salt in a third bowl.
04 -
Dip each onion ring into the flour, then the egg wash, then the panko. Press gently so the crumbs stick, then place on a rack or sheet pan.
05 -
Preheat the air fryer to 380°F for 3 minutes. Spray both sides of the breaded rings lightly with oil.
06 -
Arrange rings in a single layer with space between them. Air fry for 9-12 minutes, flipping halfway, until golden brown and crisp. Cook in batches as needed.
07 -
Sprinkle hot rings with a little flaky salt if using. Serve right away with dipping sauce.