Prep the chicken: Pat the chicken cubes dry with paper towels. Dry surfaces brown better and help the sauce stick.
Season: In a bowl, toss chicken with olive oil, salt, pepper, garlic powder, onion powder, smoked paprika, and cayenne if using.
For extra texture, sprinkle in the cornstarch and toss to coat lightly.
Preheat the air fryer: Set your air fryer to 390–400°F (200–205°C) for 3–5 minutes. A hot basket helps get those edges caramelized.
First cook: Spray the basket with cooking spray. Arrange chicken in a single layer with a little space between pieces.
Air fry for 6–7 minutes, shaking the basket halfway through so they cook evenly.
Make the glaze: While the chicken starts cooking, stir together BBQ sauce, brown sugar, and apple cider vinegar. Adjust sweetness and tang to taste.
Sauce and finish: After 6–7 minutes, transfer the chicken to a bowl and toss with half the sauce. Return bites to the basket and cook 3–5 more minutes, until the edges caramelize and the internal temperature reaches 165°F (74°C).
Final coat: Toss the hot bites with the remaining sauce so they’re glossy and sticky.
This two-step saucing keeps them juicy and prevents burning.
Garnish and serve: Sprinkle with parsley or green onions. Serve with extra sauce, ranch, or a quick yogurt dip.