Preheat oven to 350 degrees Fahrenheit. Grease cookie sheets.

Cream butter or margarine and sugar at medium speed with electric mixer. Beat in 2 eggs, vanilla and juice.

Combine baking powder and salt with flour and gradually add to creamed mixture. Dough will be sticky.

Divide dough into four balls and cover with plastic wrap. Chill four hours.

Roll each ball on lightly floured surface to quarter-inch thickness. Cut three-inch circles with cookie cutter.

Beat remaining egg with one teaspoon water. Brush rim of circle with egg wash and place one teaspoon of filling in center. (Use prune, poppy seed, apricot, raspberry, cherry, or try Double Chocolate Filling – recipe below.) Pinch edges together to form triangle, leaving center open slightly to expose filling.

Place on sheets and bake 15 to 18 minutes until lightly browned.

Process cake into fine crumbs and mix in sugar and cocoa. Add butter or margarine.

Beat in egg yolk and vanilla. Add chocolate syrup and juice. Fold in chocolate chips.

Fill hamantaschen or other cookies, strudel or Danish.