Shortbread
["2 1/2 c. flour", "1 c. sweet butter", "1/2 c. sugar", "1 egg yolk"]
["Blend together all the ingredients; form in 2 x 10-inch rolls. Beat egg white; dip rolls in or brush on.", "Then roll the rolls in mixture of sugar and cinnamon.", "Refrigerate for better handling. Cut 1/4-inch slices and bake on a greased cookie sheet until brown."]
["flour", "sweet butter", "sugar", "egg yolk"]