5 sq. Hershey's baking chocolate
1 1/2 c. butter
2 tsp. vanilla
2 c. 4X sugar (confectioners')
3 egg yolks

Melt the baking chocolate in top of double boiler over simmering water. Cream the butter, egg yolks and vanilla and slowly add baking chocolate. Add sugar to make a consistency for spreading. Yields 2 1/2 cups icing or enough for a 3 layer 8 or 9 inch cake.