Grilled Chicken with Alabama White Barbecue Sauce

Name: Grilled Chicken with Alabama White Barbecue Sauce
Cook time: 40 min
Total time: 40 min
Cuisine: American, Southern
Ingredients: 1/4 cup sugar; Kosher salt and freshly ground black pepper; Two 12-ounce bottles amber beer, chilled; 1 head garlic, split crosswise; 2 fresh bay leaves; 2 teaspoons whole black peppercorns; Two 4-pound chickens, cut into 8 pieces each; Vegetable oil, for brushing; 1 cup mayonnaise; 1/4 cup white wine vinegar; 2 tablespoons drained prepared horseradish; 2 teaspoons sugar; 1 teaspoon Worcestershire sauce; Kosher salt and freshly ground black pepper; Kosher salt and freshly ground black pepper; Hot pepper sauce, such as Tabasco, for seasoning