Barbecue Beef for Sandwiches

Ingredients (12)

• + 4 pounds boneless chuck roast add to pantry
• + 1 onion, chopped add to pantry
• ✓ 2 tablespoons butter
• + 3 tablespoons distilled white vinegar add to pantry
• + 12 ounces chile sauce add to pantry
• + 2 tablespoons brown sugar add to pantry
• + 1 teaspoon mustard powder add to pantry
• ✓ 2 tablespoons Worcestershire sauce
• + ½ teaspoon freshly ground black pepper add to pantry
• + 1 teaspoon salt add to pantry
• + ⅛ teaspoon ground cayenne pepper add to pantry
• ✓ 3 cloves garlic, minced