Instructions

Cream until light and fluffy, butter, sugar, egg yolk, vanilla and melted chocolate. Add flour and salt. Mix well, Roll small amounts of dough into balls. Dip into slightly beaten egg white and then in chopped nuts or sugar. Place on slightly greased cookie sheets and press thumb in center of each. Bake at 350 degrees for 1- to 12 minutes. Fill cooked thumbprints with icing or candied fruit.