01 - If the chicken breasts are thick, gently pound them to an even thickness of about ½ inch using a meat mallet.
02 - In a large bowl, whisk together the buttermilk, egg, salt, black pepper, garlic powder, and paprika until well combined.
03 - Add the chicken breasts to the marinade, cover the bowl, and refrigerate for at least 30 minutes or up to 4 hours for deeper flavor penetration.
04 - Set up two shallow dishes. In the first, combine the flour, breadcrumbs, salt, smoked paprika, and cayenne pepper, mixing thoroughly. In the second, place the marinated chicken after draining off any excess liquid.
05 - Dredge each marinated chicken breast in the flour-breadcrumb mixture, pressing gently to ensure the coating adheres evenly on all sides.
06 - Heat the vegetable oil in a large skillet or frying pan over medium-high heat until it shimmers and reaches approximately 350°F.
07 - Carefully place the coated chicken breasts in the hot oil and fry for 5 to 7 minutes per side until golden brown and crispy, ensuring the internal temperature reaches 165°F.
08 - Transfer the fried chicken to a paper towel-lined plate to drain excess oil. Allow it to rest for 2 to 3 minutes before serving.