Chocolate Frosting - cooking recipe

Ingredients

3/4 c. butter
1 1/2 c. confectioners sugar
1/2 c. cocoa
2 egg yolks
2 egg whites

Preparation

Cream butter, sugar and cocoa until fluffy.
Add yolks and beat.
Beat egg whites until foamy.
Add to chocolate mixture and beat until thick enough to frost cake.