Instructions: Mix cake as directed on box. Bake in a greased and floured jelly roll pan at 350 for 15 minutes.

FILLING: Cook flour and milk until thickened. Cool.

Add sugar, margarine and shortening. Beat at high speed for 8-10 minutes. Spread on cake and chill well.

FROSTING: Melt margarine and cool slightly. Add melted chocolate squares, vanilla, egg, water and confectioners sugar. Beat by hand. Frost cake.

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