Creamy Icing

Directions

1. 1
   In large bowl mix butter, shortening, sugar and vanilla.
2. 2
   Mix on high until light and fluffy; set aside.
3. 3
   Mix the flour and milk (a little at a time) in small pan.
4. 4
   Cook over medium heat, stirring constantly until thick.
5. 5
   Let completely cool.
6. 6
   When cool, add to the sugar mixture and beat on high for 3 to 5 minutes (no longer).