Whisk together buttermilk, hot sauce, salt and pepper in a large bowl. Add in the chicken pieces, cover with plastic wrap and refrigerate for 4 hours.
After the chicken has finished refrigerating, turn on your deep fryer and heat the oil to 350F. Use a kitchen thermometer to make sure your vegetable oil reaches the correct temperature. While the oil heats up, prepare your dredging mixture. In a gallon sized resealable plastic bag, combine the flour, cornstarch, onion powder, oregano, basil, white pepper, cayenne, smoked paprika, and salt.
Take the chicken out of the refrigerator and let it warm up to room temperature. Remove chicken pieces from the buttermilk mixture, shaking to remove any excess. Place it in the flour mixture breading and coat thoroughly. Once every piece of chicken has been thoroughly coated, fry 2-3 pieces at a time in the deep fryer, about 7 minutes per side or until the internal temperature reaches 165F (use a kitchen thermometer) and they are golden brown.
Once cooked through, place the chicken on a baking sheet pan lined with paper towels or a wire rack to drain. Rest for 10 minutes before serving.