Mystery Icing

Directions

1. 1
   Blend the flour and milk.
2. 2
   Cook until mixture thickens to consistency of cream.
3. 3
   Cool, but don't chill.
4. 4
   Cream sugar, butter and shortening, adding salt and vanilla.
5. 5
   Add the slightly cooked flour mixture and continue beating until very fluffy.
6. 6
   Yield: Icing for a 2-layer cake.