Poor Man'S Icing - cooking recipe

Ingredients

2 1/2 Tbsp. flour
1/2 c. milk
1/4 c. butter
1/4 c. shortening
1/2 c. sugar (granulated)
1 tsp. vanilla

Preparation

Mix first two ingredients until smooth and heat until thick and forms a ball.
Stir constantly.
Cool.
Mix remaining ingredients with beater, then add flour and milk mixture.
Beat until thick and creamy.
Double for layer cake.