Creamy Frosting
["1/2 c. flour", "1 c. milk", "1/2 c. margarine or butter", "1/2 c. shortening", "1 c. sugar"]
["Cook flour and milk over low heat and stir until thickened. Set aside to cool.", "Combine shortening, sugar and margarine and beat on high for 4 minutes until creamy.", "Add cooled flour and milk mixture and beat all together another 4 minutes with a little vanilla, if desired.", "Can add any food color."]
["flour", "milk", "margarine", "shortening", "sugar"]