|Source||Carol Kirsch (1982)|
Cream butter. Add sugar gradually. Blend in egg yolk, vanilla, salt and flour. Spread in a greased 15 x 10 x 1-inch pan, or in a rectangle about 10 x 15 inches on a greased cookie sheet. Bake at 350° for about 20 minutes. Spread while hot with melted chocolate. Sprinkle with chopped nuts. Cool. Cut into small squares. Makes about 6 dozen.