Compliments of Judy Spitale:

1 cup sugar
1/2 cup soft margarine
1/2 cup crisco
5 heaping tablespoons flour
1 teaspoon vanilla
1/2 cup milk

Combine slowly and then beat at highest speed for approx. 5 mins. 

Makes generous amount

Fluffy White Frosting

1 cup Crisco or 1/2 cup crisco and 1 stick butter
1 cup granulated sugar
1 teaspoon vanilla
6 tablespoons flour
3/4 cup very warm milk

Beat crisco.  Beat in sugar well.  Add flour one tablespoon at a time.  Slowly add very warm milk and beaton high until dissolved- about 10 minutes.  Add vanilla.  Stores well at room temp.  Do not refrigerate and try to rebeat.