Nana's Red Velvet Cake Icing

Mix the flour and milk in a small saucepan.

Over medium heat bring to a slow boil while stirring constantly (use a wisk).

Boil until thick, remove from heat, place pan in refrigerator.

While boiled mixture is cooling, using mixer cream together butter, powdered sugar and vanilla extract.

When boiled mixture is completely cool add to butter mixture and beat until very fluffy and thick.