This recipe is from Shirley McNevich's Mom's Best Recipes Vol 5. Published here with her permission.
Don't forget to check Shirley's blog.
(by Aunt Isabelle "Snooky" [McNevich] Worhach)
3 TBSP flour
1/2 cup milk
1/2 cup butter or Parkay margarine
1/2 cup white sugar
1 or 2 tsp. vanilla
In a saucepan over low heat add flour and slowly add milk--stir and heat until
it makes a paste. Add butter/margarine and white sugar--stir until mixed and
until white sugar is completely dissolved. Pour hot mixture into a mixer and
add vanilla--beat on high until creamy and spreadable. Makes enough to
frost one 9 x 13 cake. If icing is too thick add a little more milk--beat. If icing
is too runny add a little powdered sugar--beat.