1/2 c. vegetable shortening
1/2 c. butter
1 box powdered sugar
4 tbsp. cake or reg. flour
4 tbsp. cream
2 tsp. vanilla
1 lg. or 2 sm. egg whites

Cream together shortening and butter. Sift powdered sugar with cake flour. Add sifted ingredients alternately with cream and vanilla. Beat on high for 4 to 5 minutes. Add egg whites and beat another 4 to 5 minutes.