I call it our Volcano sauce, here's the recipe. I started with 2 gallons of my Old Fashioned sauce, so you need to figure out a smaller portion. Use your favorite sweet Tomato BBQ sauce, Sweet Baby Ray's is good. I added 1 17 oz. bottle of Sriacha sauce and 2 cups of cider vinegar, simmer till blended, stir frequently, adjust to your heat needs...this is seriously good hot bbq sauce, let me know what you think!