Combine the flour and sugar; add nuts and mix. Blend in butter with fork until dough clings together. Chill for ease in handling. Roll dough to 1/8 inch thickness. Cut into 1 1/2 inch circles with floured cutter. Place on greased cookie sheet. Bake at 375ºF. for 7 to 10 minutes. Remove to wire racks to cool. Make into sandwiches by spreading a thin layer of jam between two cookies. Ice with chocolate butter frosting and top with an almond half.