2 c. flour
1/2 lb. butter
1 egg yolk
3/4 c. sour cream

NUT FILLING:

3/4 c. walnuts (ground)
3/4 c. sugar
1 tsp. vanilla

Mix dough well (it will be sticky); chill overnight. Divide dough into 3 parts. Keep 2 parts in refrigerator while you roll out the third part like pie crust. Sprinkle top of dough with nut mixture. Cut out dough into wedges or triangle shapes. Make small wedges. Roll from wide end to narrow end. Bake on cookie sheet at 350 degrees for 13 to 15 minutes. Roll in powdered sugar. these are better the second day.