Duncan Hines Perfectly Moist Butter Recipe Fudge Cake Mix has buttery chocolate flavor in every bite. Topping this fudge cake with Duncan Hines frosting will raise dessert to the next level. This butter recipe cake mix can be prepared in many shapes and sizes; use it for chocolate birthday cake, sheet cake or cupcakes. Just add water, eggs and butter, then mix and pour into your pan, following the baking time for your pan's size. Each box makes one 13 by 9 inch chocolate cake or 24 cupcakes. From a layer cake to brownies, Duncan Hines has you covered when you’re ready to bake and create.