Close the bag and massage the chicken to coat it with the oil.
Sprinkle the cornstarch, onion powder, salt, dry mustard, smoked paprika, and ground pepper.
Close the bag and massage to coat all the chicken drumsticks.
Place the drumsticks in the air fryer basket, don’t overpack the basket so they can cook evenly.
Cook in the air fryer on a manual setting at 400 degrees F. for 9 minutes. Flip them and cook for an additional 8 minutes or until the internal temperature reaches 165 to 175 degrees F.