•2 tablespoons unsalted butter
•1/4 cup minced onion
•1 medium clove garlic, minced
•1 1/2 teaspoons chili powder
•1/4 teaspoon ground cayenne
•2 tablespoons brown sugar
•2 cups tomato juice
•3/4 cup distilled white vinegar
•2 tablespoons Worcestershire sauce
•1/2 teaspoon mustard powder mixed with 1 tablespoon water
•1 teaspoon minced chipotle chile in adobo
•2 tablespoon dark molasses
•1 1/2 teaspoons salt
•1/4 teaspoon ground black pepper