Red Cake Frosting

Directions

1. 1
   In a shaker, combine milk, flour and salt.
2. 2
   Shake well.
3. 3
   In heavy saucepan, cook on medium heat until thick.
4. 4
   Cool.
5. 5
   Combine sugar, margarine, and shortening.
6. 6
   Beat at high speed till fluffy.
7. 7
   Add milk mixture and vanilla.
8. 8
   Beat till fluffy.