Linzer Hearts
["3/4 lb. (3 sticks) butter (sweet), softened", "1 3/4 c. confectioners sugar", "1 egg", "2 c. unbleached all-purpose flour, sifted", "1 c. cornstarch", "2 c. shelled walnuts, finely grated", "1/2 c. red raspberry preserves"]
["Cream butter and 1 cup of sugar until light and fluffy.", "Add egg and mix well."]
["butter", "confectioners sugar", "egg", "flour", "cornstarch", "walnuts", "red raspberry preserves"]