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["In large mixing bowl, cream together butter and 1 cup sugar until fluffy.", "Add egg and beat well.", "Sift together flour and cornstarch and add to butter mixture.", "Stir in walnuts.", "Mix well.", "Place dough in a ball in wax paper and chill for roughly 5 hours.", "Roll dough on lightly floured surface to 1/4"" thickness.", "Using cookie cutters, cut out equal numbers of solid hearts and hearts with centre cut out.", "(You can either re-roll the cut out centres to make more of the larger hearts or bake them all for little bite-size cookies.)", "Place on ungreased cookie sheet.", "Chill for 30 minutes.", "Bake at 325 for 10- 15 minutes or until lightly browned.", "Place on rack to cool.", "While still slightly warm, spread the bottom side of the full hearts with jam- about 1/4 tsp each.", "Top with heart that has centre cut out.", "Bottoms should be together, tops facing out for a smoother look.", "(For mini hearts, spread jam on bottom of one heart and top with a second of same size- bottoms together) Sift 1/2 cup of the remaining sugar and press bottoms of cookies in sugar to coat.", "Gently sift the remaining 1/4 cup sugar over tops of cookies."]