01 - Whisk buttermilk, hot sauce, salt, pepper, garlic powder, and paprika in a bowl. Add chicken thighs, ensuring complete coating. Marinate for 20 minutes or overnight refrigerated for optimal flavor penetration.
02 - Combine flour, cornstarch, salt, paprika, cayenne, onion powder, and garlic powder in a large bowl. Whisk thoroughly to distribute spices evenly throughout the flour mixture.
03 - Remove chicken from marinade, allowing excess liquid to drip off. Press each thigh firmly into the flour mixture, ensuring thick, even adhesion of coating. Transfer to wire rack.
04 - Pour vegetable oil 1 inch deep into a skillet or Dutch oven. Heat to 350°F, maintaining steady temperature throughout frying process.
05 - Fry chicken in batches without overcrowding. Cook 5-7 minutes per side until golden, crispy, and internal temperature reaches 165°F. Drain on wire rack or paper towels.
06 - Toss shredded cabbage, grated carrot, mayonnaise, vinegar, salt, and pepper in a bowl. Mix thoroughly until vegetables are evenly coated.
07 - Lightly toast buns if desired. Spread mayonnaise on bottom bun, layer lettuce, fried chicken thigh, slaw, and pickle slices. Crown with top bun and serve immediately while hot and crispy.