Cooked Icing

Directions

1. 1
   Cook milk and flour until thick.
2. 2
   Cool.
3. 3
   Beat butter, shortening, sugar and vanilla until sugar is dissolved.
4. 4
   Add milk mixture to sugar mixture until fluffy.
5. 5
   Add peanut butter to taste.
6. 6
   Mix until blended and fluffy.