1 (9 x 13) inch chocolate cake
5 tbsp. flour
1 c. milk
1 c. sugar
1/2 tsp. salt
1/2 c. vegetable shortening
1 tsp. vanilla

 Bake cake and cool.  Mix flour and milk.  Cook over low heat until thick, remove from heat and cool.  Place shortening, butter, salt and vanilla in mixing bowl and mix.  Add cooled flour and milk mixture and beat at high speed until filling is like whipped cream.  Cut cooled cake in half lengthwise and put on filling.  Place top back on and frost with favorite icing.