Mix:

2 1/2 tbsp. flour
1/2 c. milk

Cook to very thick paste, stirring constantly, for about 10 minutes. Cool to lukewarm.

Cream:

1/2 c. Crisco shortening
1/2 c. sugar
1/4 tsp. salt

Add lukewarm paste. Beat until light and fluffy. Add 1/2 teaspoon vanilla.

Variation: Add 3 tablespoons cocoa to make chocolate frosting.