Combine mayonnaise, apple cider vinegar, garlic, mustard, 1 Tbsp. water, and ½ tsp. of black pepper in a mixing bowl. Refrigerate until plating. You'll find lots of regional BBQ styles scattered across the states, but one of the most unique is the use of white BBQ sauce in Alabama. Invented by Big Bob Gibson, this tangy condiment is great with chicken and pork.