Ingredients
1 cup whole milk
5 tbs flour
1/2 cup butter, softened
1/2 cup shortening
1 cup sugar
1 tsp vanilla ext.
Preparation
Combine milk and flour in a saucepan, cook until thickened. Cover and refrigerate.
In a mixing bowl, beat butter, shortening, sugar and vanilla ext until creamy (5-10 minutes).
Add chilled milk/flour and beat another 10 minutes.
Frost cooled cake.