Cake Frosting - cooking recipe

Ingredients

1/4 c. butter
1/4 c. shortening
1/2 c. sugar
1 1/2 Tbsp. flour
1/2 c. milk
pinch of salt
1 tsp. vanilla

Preparation

Cook flour and milk until thickened.
Let cool.
Cream the shortening, butter and sugar.
Add cooled flour and milk mixture, tablespoon by tablespoon, beating all the time with mixer.
When finished, it will be like whipped cream.