Bakers Icing(White)

Directions

1. 1
   Mix flour and milk until smooth.
2. 2
   Cook slowly, stirring occasionally until mixture thickens.
3. 3
   Remove from heat and cool. Add butter and shortening and blend at low speed.
4. 4
   Add salt.
5. 5
   Beat at high speed until smooth and fluffy.
6. 6
   Blend in sugar.
7. 7
   Beat at high speed until sugar crystals dissolve.
8. 8
   Add vanilla.
9. 9
   Beat 1 minute at high speed.