01 - In a large bowl, whisk together the buttermilk, hot sauce, sea salt, and black pepper until well combined. Submerge the chicken pieces in the marinade, cover tightly, and refrigerate for at least 2 hours or up to overnight for maximum flavor penetration.
02 - In a separate large bowl or shallow dish, combine the all-purpose flour, cornstarch, paprika, garlic powder, onion powder, cayenne pepper, salt, and black pepper. Whisk thoroughly to distribute all seasonings evenly throughout the flour mixture.
03 - Remove the chicken from the marinade, allowing excess buttermilk to drip off. Dredge each piece in the seasoned flour mixture, pressing firmly on all sides to ensure a thick, even coating. Arrange the coated chicken on a wire rack and let rest for 10 minutes to allow the coating to adhere properly.
04 - Pour vegetable oil to a depth of 2 inches into a heavy-bottomed skillet or deep fryer. Heat over medium-high heat until the oil reaches 350°F (175°C). Use a thermometer to monitor and maintain the temperature throughout frying.
05 - Carefully lower the chicken pieces into the hot oil in batches, being careful not to overcrowd the pan. Fry for 12–15 minutes, turning occasionally, until the exterior is deep golden brown and the internal temperature registers 165°F (74°C). Transfer to a paper towel–lined plate or wire rack to drain.
06 - While the chicken fries, melt the unsalted butter in a small saucepan over medium heat. Stir in the honey, hot sauce, crushed red pepper flakes (if using), and a pinch of salt. Simmer gently for 1 minute, stirring constantly, until the glaze is smooth and well blended.
07 - Drizzle the spicy honey butter glaze generously over the fried chicken, or toss the chicken pieces in the glaze until evenly coated. Serve immediately while hot and crispy.