Combine flour, sugar and salt. ... Bake on cookie sheet at 350 degrees for 20 ... consistency to spread. Beat until smooth. Spread on cooled sheet cake.
Ingredients: 15 (cocoa .. eggs .. flour .. milk .. salt .. soda ...)
Use 10 1/2 x 15 1/2 sheet pan. Make cake mix, bake, cool. Beat together ... Refrigerate. Can be made day before. Bake at 350 degrees for 28 to 34 minutes.