Waldorf Astoria Frosting - cooking recipe

Ingredients

1 cup milk
1/4 cup flour
1/2 cup margarine
1/2 cup shortening
1 cup granulated sugar
1 teaspoon vanilla extract

Preparation

Combine milk and flour in saucepan; mix well.
Cook until thick, stirring constantly.
Cool.
Cream remaining ingredients in bowl till light and fluffy.
Add milk mixture. Beat until fluffy.
Frost cooled cake.
Enough frosting for 2 layers.