Rugalach
["2 c. flour, sifted", "2 sticks butter, softened", "3/4 c. sour cream", "1 egg yolk", "1 c. sugar", "3 tsp. cinnamon", "1/4 c. chopped walnuts"]
["Mix together first four ingredients.", "Blend with hands and roll into 2 balls.", "Wrap balls and refrigerate overnight.", "Next day, combine sugar, cinnamon, and walnuts.", "Set aside.", "Roll out each dough ball to 1/4-inch thickness.", "Place dinner plate over dough and cut into large circle, using plate as a guide.", "Slice each circle into 8 pie slices.", "Place tablespoon of cinnamon-sugar mixture on large end of pie slice and roll.", "Place on ungreased cookie sheet and bake 15 to 20 minutes at 350\u00b0."]
["flour", "butter", "sour cream", "egg yolk", "sugar", "cinnamon", "walnuts"]