Toss together chicken pieces, black pepper, salt, paprika, rosemary, thyme, oregano, sage, white pepper, and cayenne in a large bowl to coat.
Stir in buttermilk until chicken is coated. Refrigerate for 6 hours.
Combine flour, salt, paprika, cayenne, garlic powder, white pepper, and onion powder in a large shallow dish.
Remove chicken from the buttermilk and dredge each piece in the seasoned flour. Shake off any excess and transfer to a plate.
Heat peanut oil in a large Dutch oven to 350 degrees F (175 degrees C). Add all the chicken to the pan and cook for 10 minutes.
Turn chicken pieces and cook for another 10-15 minutes.
Remove chicken from the oil and transfer to a cooling rack set over a paper towel lined baking sheet. Let sit for 10 minutes before serving.
Recipe Notes
The oil is 350 degrees F (175 degrees C) to start, but when the chicken goes in it will drop to about 300 degrees (150 degrees C). It should rise back to 305-310 degrees F (155 degrees C) and be held at that temperature until done, about 20 minutes.