Prep the chicken: Pat the chicken pieces dry with paper towels. This helps the coating stick and improves crisping.
Mix the wet dip: In a bowl, whisk the buttermilk and egg until smooth.
Season the dry mix: In a shallow dish, stir together panko, flour, garlic powder, onion powder, smoked paprika, salt, and pepper.
Coat the chicken: Dip each chicken piece in the buttermilk mixture, letting excess drip off.
Then press into the panko-flour mix until fully coated. Place coated pieces on a plate or tray.
Preheat the air fryer: Set to 400°F (200°C) for 3–5 minutes. A hot basket helps crisping from the start.
Arrange and spray: Lightly spray the air fryer basket.
Arrange chicken in a single layer with space between pieces. Lightly mist the tops with oil spray.
Air fry, flip, and finish: Cook at 400°F for 8–10 minutes, flipping halfway and spraying again lightly. The bites are done when golden and the internal temperature reads 165°F.
Work in batches: If needed, cook in two or more rounds to avoid overcrowding.
Crowding leads to steaming, not crisping.
Make the sauce: In a bowl, whisk mayonnaise, sweet chili sauce, sriracha, honey (if using), rice vinegar, and a pinch of salt until smooth. Adjust heat and sweetness to taste.
Toss and serve: For super-crispy bites, toss lightly or drizzle the sauce right before serving. Garnish with green onions, sesame seeds, cilantro, and a squeeze of lime.