1 cup milk
4 tbsps sifted flour
8 tbsps butter
8 tbsps shortening
1 cup sugar
2 tsps vanilla
food colors as desired, optional
In a small saucepan, combine the milk and flour. Boil the mixture until it thickens. Set aside to cool. Beat butter and shortening together for 4 minutes until fluffy. Add sugar and beat 4 minutes longer. Add cooled flour mixture and beat another 4 minutes. Add vanilla and beat until it is blended in. Add food colors, if desired. Use to frost your favorite cake.
Note: This is enough frosting to frost a two-layer cake.
Note: This frosting will keep for a week in the refrigerator if you need to make it ahead.