In a large bowl, add chicken pieces and 2 teaspoons of seasoning. Rub the seasoning into the chicken, then pour buttermilk over the chicken, ensuring they are fully coated in the buttermilk mixture. Allow the chicken to marinate for at least 1 hour, or preferably, overnight in the refrigerator.
When ready to cook, preheat your oven to 400°F (200°C) and spray a baking rack and place it on a rimmed baking sheet. Set aside.
Remove the chicken from the refrigerator. In a separate bowl, combine the all-purpose flour, potato flakes, and the remaining 3 teapoons of soul food seasoning or seasoned salt. Mix well to incorporate the seasonings into the flour mixture.
Remove each piece of chicken from the buttermilk marinade, allowing any excess liquid to drip off. Dredge the chicken in the seasoned flour mixture, pressing gently to ensure an even coating on all sides.
After arranging the chicken pieces on a baking rack, let them rest for 15 minutes to ensure the coating adheres before spraying them lightly with oil and baking in the oven.
Bake the chicken in the preheated oven for 55-60 minutes, flipping halfway. Bake until the internal temperature reaches 165°F (74°C) and the chicken is golden brown and crispy.
Once cooked, remove the chicken from the oven and let it rest for a few minutes before serving.