Hobnail Icing - cooking recipe

Ingredients

1 c. sifted confectioners sugar
2 to 3 egg yolks or 1 small egg
1/4 c. milk
3 sq. unsweetened chocolate (3 oz.), melted
1 Tbsp. soft shortening
3/4 tsp. vanilla

Preparation

Place bowl in ice water.
Use mixer to beat until of spreading consistency.
Spread icing smoothly on cake.