Preheat the oven to 400°F (200°C).
Cut the chicken into bite-sized pieces.
Marinate the chicken in buttermilk for at least 30 minutes.
In a bowl, combine flour, cornmeal, paprika, garlic powder, onion powder, salt, and pepper.
Coat the marinated chicken pieces in the flour mixture, shaking off any excess.
Place the coated chicken on a baking sheet lined with parchment paper.
Lightly spray the coated chicken with olive oil.
Bake in the preheated oven for 20-25 minutes, turning halfway through.
Check for doneness and serve hot.