Custard Frosting - cooking recipe

Ingredients

1 c. milk
5 Tbsp. flour
1/2 c. shortening
1 stick margarine
1 c. sugar
1 tsp. vanilla

Preparation

In a saucepan, cook milk and flour, stirring constantly, until mixture forms a thick paste.
Take off heat and place in a bowl. Cover with wax paper and cool.