01 - In a large bowl, whisk together the buttermilk, hot sauce, sea salt, and black pepper until well combined.
02 - Submerge the chicken pieces in the marinade, cover tightly, and refrigerate for at least 2 hours or up to overnight for maximum tenderness and flavor penetration.
03 - 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 spices evenly.
04 - Remove chicken pieces from the marinade, allowing excess buttermilk to drip off. Press each piece firmly into the seasoned flour mixture, ensuring an even, thick coating on all sides. Place the coated chicken on a wire rack and let rest for 10 minutes to allow the coating to adhere.
05 - Pour approximately 2 inches of vegetable oil into a heavy-bottomed skillet or deep fryer. Heat to 350°F over medium-high heat. Use a thermometer to maintain consistent temperature throughout frying.
06 - Carefully lower chicken pieces into the hot oil in batches, being careful not to overcrowd the pan. Fry for 12 to 15 minutes, turning occasionally, until deep golden brown and the internal temperature registers 165°F. Transfer to a paper towel-lined plate or wire rack to drain.
07 - While the chicken fries, melt the unsalted butter in a small saucepan over medium heat. Add the honey, hot sauce, crushed red pepper flakes if using, and a pinch of salt. Stir and simmer for 1 minute until the glaze is smooth and well blended.
08 - Drizzle the warm spicy honey butter glaze over the fried chicken or toss the chicken pieces directly in the glaze until evenly coated. Serve immediately while hot and crispy.