Rugelach - cooking recipe

Ingredients

1 cup butter (I use parkay)
2 cups flour
1 egg yolk
3/4 cup sour cream
3/4 cup granulated sugar
1 teaspoon ground cinnamon
3/4 cup walnuts, chopped
1/4 cup butter, melted

Preparation

Cut butter into flour using 2 knives.
In separate bowl, beat egg yolk and sour cream.
Mix well and then add flour mixture. Once again, mix well.
Divide dough into 3 parts, cover with plastic wrap and refrig. at least 3 hours.
Prepare filling by combining sugar, cinnamon, and walnuts. Preheat oven to 375.
Working with one portion of dough at a time, roll into a circle approximately 1/8 inch thick.
Brush with melted butter and spread 1/3 of the filling mixture on each portion.
Cut each circle into 16 wedges (like a pizza). Roll, starting at large end.
Place on greased cookie sheets.
Bake 15 minutes or until lightly browned.
Cool. Sprinkle with powdered sugar.