1 c. chocolate chips
4 tbsp. hot water or coffee
4 tbsp. confectioners' sugar
4 egg yolks
1/2 c. of soft butter
1 tbsp. vanilla

Put chocolate chips and hot water or coffee into blender container. Cover and blend until chocolate chips are dissolved into smooth chocolate. Add sugar and egg yolks - one at a time, butter and vanilla. Blend until smooth. Refrigerate until frosting reaches spreading consistency.