In a large bowl, combine ... butter, sugar and egg. Beat until creamy. Gradually ... 375°F oven until cookies are set but not hard ... 3 dozen or more.
Put sifted flour into a ... is crumbly. Add egg yolks and sour cream; mix ... Makes 2 dozen cookies. Combine walnuts, sugar and ... stiffly beaten egg whites. Makes enough filling for 2 dozen cookies.