Cooked Cake Icing

Directions

1. 1
   Put 1/2 of milk in double boiler; heat and use other half with flour to make a paste.
2. 2
   Put paste into heated milk and cook until very thick and heavy, almost like a ball, stirring constantly.
3. 3
   Let cool until thoroughly cold.
4. 4
   Put in mixer and add the remaining ingredients.
5. 5
   Beat until fluffy.