These air-fryer onion rings are a great alternative to traditional deep-fried onion rings. The homemade dipping sauce adds to the savory flavor and adds a creamy note to counter the crispy coating.
Preheat air fryer to 375°F for 3 minutes. Coat the fryer basket with cooking spray.
Separate onion slices into rings. Toss the onion rings with onion powder, 1/2 teaspoon garlic powder and 1/4 teaspoon salt in a large bowl. Whisk eggs, flour and 1/2 cup buttermilk in a shallow dish. Place panko in another shallow dish. Dip each onion ring in the egg mixture, allowing excess to drip off, then dredge in the panko to coat completely; place in the fryer basket. Repeat until the basket is full. Coat the onion rings with cooking spray. Cook, flipping once, until crispy, about 8 minutes. Repeat with the remaining onion rings in batches as needed.
Meanwhile, whisk mayonnaise, chives, parsley and the remaining 1/4 cup buttermilk and 1/2 teaspoon garlic powder in a small bowl. Sprinkle the onion rings with the remaining 1/4 teaspoon salt and serve with the dipping sauce.