Step 1: Marinate the Chicken

1. In a large bowl, combine the buttermilk, salt, and black pepper. If you don’t have buttermilk, simply mix 2 cups of milk with 2 tablespoons of lemon juice and let it sit for 5 minutes.
2. Add the chicken pieces to the buttermilk mixture, making sure each piece is well coated.
3. Cover the bowl with plastic wrap and refrigerate for at least 4 hours, or preferably overnight. This step is crucial for tenderizing the chicken and infusing it with flavor.

Step 2: Prepare the Coating

4. In a separate large bowl, mix together the flour, cornstarch, paprika, garlic powder, onion powder, white pepper, black pepper, oregano, basil, thyme, celery salt, and mustard powder. Stir well to combine.
5. Set up a dredging station with the seasoned flour mixture in one bowl and the marinated chicken in another.

Step 3: Dredge the Chicken

6. Remove the chicken pieces from the buttermilk marinade, letting the excess drip off.
7. Coat each piece in the seasoned flour mixture, pressing firmly so the flour adheres well.
8. For extra crispiness, dip the coated chicken back into the buttermilk, then coat again in the flour mixture. This double-coating technique creates the signature crunch.

Step 4: Heat the Oil

9. Pour vegetable oil into a deep frying pan or Dutch oven, filling it up to 2-3 inches deep. Heat the oil to 170°C (340°F)—this ensures even cooking without burning the outside.
10. To test if the oil is ready, drop a small pinch of flour into the oil—if it sizzles and floats, it’s good to go.

Step 5: Fry the Chicken

11. Carefully place 3-4 pieces of chicken into the hot oil, making sure not to overcrowd the pan.
12. Fry for 6-8 minutes per side, turning occasionally until the chicken is golden brown and crispy.
13. Check doneness by inserting a meat thermometer into the thickest part—the internal temperature should read 75°C (165°F).
14. Transfer the fried chicken to a wire rack to drain excess oil. Avoid using paper towels, as they can make the crust soggy.

Step 6: Serve and Enjoy!

15. Let the chicken rest for a few minutes before serving. Pair it with coleslaw, fries, mashed potatoes, or your favorite dipping sauce for the ultimate KFC-style experience.