Anise Cookies

Beat powdered sugar, egg yolks and salt in a large bowl until creamy. In a separate bowl, beat egg whites until very stiff; fold into sugar mixture. In another bowl combine flour, anise seed and baking powder. Fold into creamed mixture quickly but thoroughly. Fill a pastry bag fitted with a plain nozzle with cookie dough. Pipe small rounds onto ungreased baking sheets. Let stand overnight to dry. Preheat oven to 325°F and bake cookies 20 minutes or until set. Cool on a wire rack.