Pepsi Barbecue Sauce 2 tablespoons butter 1 onion, finely chopped 1 teaspoon garlic powder 1 teaspoon onion salt 2 cups ketchup 1 (12 ounce) can Pepsi 1 tablespoon Worcestershire sauce 1 tablespoon prepared mustard 2 teaspoons vinegar 1 cup brown sugar 2 tablespoons Open Pit BBQ sauce Salt and pepper to taste Bring all ingredients to a boil, then simmer for 1 hour.