DEVIL'S FOOD CAKE

Cream shortening; add sugar, melted chocolate and mashed potatoes; mix well; add yolk of egg, milk, and flour and baking powder which have been sifted together; beat well; add nuts, vanilla and beaten white of egg; mix thoroughly. Bake in greased shallow pan in moderate oven 25 to 35 minutes. Cover with

MARSHMALLOW ICING

Boil sugar and water without stirring until syrup spins a thread; melt marshmallows in syrup; pour slowly over beaten white of egg; add flavoring and spread very thickly over cake. Melt 2 ounces unsweetened chocolate with one half teaspoon butter and spread thin coating over icing when cool.