Mix butter, cream and flour. Chill mixture for two hours. Roll one half of the dough at a time, keeping the rest chilled. Roll dough 1/8 inch thick on floured board. Cut into circles. Transfer rounds to waxed paper heavily covered with granulated sugar. Turn each round so that each round is covered on both sides. Place on ungreased cookies sheet. Prick several times with fork. Bake at 375 degrees for 7-9 minutes. Mix filling ingredients together. Spread filling on one wafer and top filling with another wafer to create a wafer sandwich.