1 cup semi-sweet morsels
1/4 cup butter or margarine
1/2 cup dairy sour cream
2-2 1/2 cups sifted powdered sugar

In a saucepan, over low heat, melt chocolate pieces and margarine or butter. Stir frequently.

Cool about 5 minutes. Stir in sour cream. Gradually add powdered sugar, beating until smooth and of spreading consistency. Spread on brownies.