Skrewball Peanut Butter Whiskey is whiskey with natural flavors. Skrewball combines smooth whiskey and the flavor of creamy peanut butter. This harmonious blend of unusual flavors might seem a bit surprising, but it’s a whole lot of delicious. While the full ingredient list is proprietary, it’s made with ingredients such as natural flavors derived from peanuts, cane sugar, and whiskey.