Mocha German Chocolate Cake 1 box mix, German Chocolate Cake Eggs and oil as specified on the box 2/3 cup powdered milk 2 cups quadruple-strength coffee, cooled Tup of appropriate frosting Brew MASSIVELY strong coffee (1/4 to /3 cup dry coffee grounds to brew 2 cups). Cool, and use in place of water for the cake. Combine the powdered milk with the box mix. Prepare according to box directions, substituting the coffee above for the water --- might only call for 1 1/2 cup. When cool, frost.