Marinate chicken in buttermilk (fully submerged) in the refrigerator for 2 to 3 hours or up to 24 hours overnight.
Preheat oven to 400 degrees F. Place a wire rack on a baking sheet, spray generously with cooking spray, and set aside.
Stir together the breadcrumbs, cheese, and spices in a shallow, large bowl. One-by-one remove chicken pieces from buttermilk, shake off the excess, and dredge in breadcrumb mixture until fully coated. Place chicken on a baking rack.
Generously coat chicken with cooking spray and cook until golden brown and the meat is done (165 degrees when inserted with a thermometer), about 35 to 45 minutes.