Mississippi Mud Cake

Mix sugar and shortening. Add eggs. Sift flour, cocoa and salt together. Add to mix. Add vanilla and nuts. Pour into greased and floured 13 x 9 pan.25x30 cm. Bake at 300 degrees = 150 Grader C for 35 minutes. Take out of oven, spread marshmallows evenly over top. Return to oven for 5 minutes. Take out and cool. Spread with frosting below: Melt butter. Mix cocoa and butter in large bowl. Add the remaining ingredients and mix well. Spread over cooled cake.