Place the chicken tenders in a ziplock bag and pour the buttermilk into the bag. Squeeze the air out and seal the bag. Let marinate in the refrigerator for 30 minutes
In a shallow bowl combine the panko bread crumbs, flour, baking powder, and spices.
Remove the chicken strips from the buttermilk with a fork, shake off excess buttermilk, and dredge in the breadcrumb mixture to coat on all sides.
Spray the bottom of the air fryer pan.
Put the chicken fingers in the air fryer basket, lightly spray with your favorite oil spray, then air fry at 375˚F/191˚C for 10-12 minutes until internal temperature reads 165˚F/74˚C and the chicken tenders are golden brown and crispy. You'll want to flip the chicken at about half way through cooking time.
If making your chicken tenders in batches, simply keep cooked chicken warm in a 160˚F/77˚C oven. You can re-crisp in the airfryer for a minute, if needed.