Pat the drumsticks dry with a paper towel, then brush with 1 tablespoon of olive oil. Place the drumsticks in a large Ziploc bag.

In a small bowl, stir together the flour, baking powder, paprika, salt, pepper, and onion powder. Shake the bag until the drumsticks are evenly covered with the spice mixture.

Lightly spray the air fryer basket with cooking spray, or brush a light coating of olive oil over the basket to prevent drumsticks from sticking.

Transfer the drumsticks from the bag to the air fryer basket, placing them in a single layer, without overlapping or stacking.

Air fry at 400 degrees F for 20 minutes, flipping chicken drumsticks halfway through the cooking time.

Chicken will be done when it is golden brown and crispy, and when an instant read meat thermometer reaches an internal temperature of 175° F.