Cream sugar and shortening and add eggs. Beat, sifted flour, coca together and add to mixture. Add vanella and nuts. Pour into greased and floured 13x9 pan. Bake 35 minutes at 300. Spread marshmallows over top. Return to oven for 5 minutes, Spead with this frosting 2 sticks of butter, 1/2 cup cocoa, 1 box powdered sugar, 1/2 cup pet milk, 1 tsp vanella and 1 cup nuts.