01 - Preheat grill or oven to 400°F.
02 - Pat chicken dry and rub with olive oil, smoked paprika, garlic powder, onion powder, salt, and pepper.
03 - Grill chicken for 6-8 minutes per side, or roast on lined baking sheet for 20-25 minutes until internal temperature reaches 165°F. Rest for 5 minutes.
04 - Whisk together mayonnaise, apple cider vinegar, lemon juice, horseradish, Dijon mustard, sugar, garlic powder, black pepper, cayenne, and salt until smooth.
05 - Combine shredded cabbage, mayonnaise, apple cider vinegar, salt, and pepper in bowl. Mix until evenly coated.
06 - Cut rested chicken into bite-sized pieces. Toss with half of Alabama white sauce until coated.
07 - Pile sauced chicken onto toasted buns. Top generously with slaw. Drizzle additional white sauce if desired. Add pickles for extra tang.
08 - Serve sandwiches immediately while warm.