Recipe for Microwave Sponge Cake : 1) Large sponge,2 cups of confectioners sugar,1/2 cup evaporated milk,1 egg,1/4 teaspoon artificial vanilla extract,1 idiot.Combine evaporated milk and egg in medium bowl and beat thoroughly,fold in sponge,vanilla and sugar.Microwave on high for 5-10 minutes or until aroma sets off smoke alarm.