Recipe by: Mae Fautsch Preheat oven to 350 degrees. Lightly grease a 12X16 cookie sheet. Cream butter and sugar until light. Add egg yolk, blend well. Blend in flour. Spread as thinly as possible in the cookie sheet. Bake at 350 degrees for 20 minutes or until lightly browned. While still hot, spread chocolate bar over top. Sprinkle on nuts while the chocolate is still soft. Let cool so topping hardens, then cut into little squares. NOTES : A Holiday favorite the whole family loves 'em ----