01 - Whisk buttermilk, hot sauce, salt, pepper, garlic powder, and paprika in a bowl until fully combined. Submerge chicken thighs in the mixture, ensuring complete coverage. Marinate for 20 minutes minimum or refrigerate overnight for optimal flavor penetration.
02 - Combine flour, cornflour, salt, paprika, cayenne, onion powder, and garlic powder in a large bowl. Mix 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, coating all sides generously. Shake off loose flour and transfer pieces to a wire rack for 5 minutes to set the coating.
04 - Pour vegetable oil into a deep skillet or Dutch oven to a depth of 1 inch. Heat over medium-high heat until temperature reaches 350°F, maintaining steady heat throughout frying.
05 - Carefully place chicken pieces in hot oil without overcrowding. Fry 5 to 7 minutes per side until deep golden brown and crispy. Verify internal temperature reaches 165°F. Transfer to wire rack or paper towels to drain.
06 - Combine shredded cabbage, grated carrot, mayonnaise, apple cider vinegar, salt, and pepper in a mixing bowl. Toss until vegetables are evenly coated. Adjust seasoning to taste.
07 - Lightly toast burger buns for added texture. Spread mayonnaise on bottom buns, layer lettuce leaves if desired, top with crispy fried chicken, mound slaw generously, arrange pickle slices, and crown with top bun.
08 - Present burgers while chicken remains hot and coating maintains maximum crunch. Pair with french fries, coleslaw, or potato salad alongside cold lager or sweet tea.