The "Best" Cake Icing

Directions

1. 1
   In shaker or jar, blend until smooth the milk and flour.
2. 2
   Cook until thick, stirring constantly.
3. 3
   Mixture will be very thick. Cool.
4. 4
   Cream remaining ingredients together until light and fluffy with mixer in a medium sized bowl.
5. 5
   Gradually add cooled milk/flour mixture to sugar/butter while beating at high speed until all sugar granules are dissolved.
6. 6
   Ready to frost cooled cake.