Ingredients
1 cup cola
1 cup ketchup
1/4 cup Worcestershire sauce
1 teaspoon liquid smoke
3 tablespoons steak sauce
1 teaspoon onion flakes
1 teaspoon garlic flakes
1/2 teaspoon freshly ground black pepper

Directions

Combine all the ingredients in a heavy non-reactive saucepan and gradually bring to a boil over medium heat. Reduce the heat slightly to obtain a gentle simmer. Simmer the sauce until reduced by a quarter, 6 to 8 minutes. Use right away or transfer to a large jar, cover, cool to room temperature and refrigerate. The sauce will keep for several months.