Butterhorns
["1/2 lb. butter", "2 c. sifted flour", "1 egg yolk", "3/4 c. sour cream", "3/4 c. sugar", "1 tsp. cinnamon", "3/4 c. nuts, chopped"]
["In a large bowl, cut butter into flour with a pastry blender or fork. Add egg yolk and sour cream. Mix well. Shape into a ball. Sprinkle with flour and wrap in waxed paper. Chill in refrigerator for several hours."]
["butter", "flour", "egg yolk", "sour cream", "sugar", "cinnamon", "nuts"]