In a bowl, cream butter and confectioners' sugar. Beat in extract. Combine flour, oats, almonds and salt; gradually add to the creamed mixture. Roll level tablespoonfuls of dough into ropes. Place 2 in. apart on ungreased baking sheets and curve into crescents. Bake at 325° for 14-16 minutes or until lightly browned. Remove to wire racks to cool; roll in additional confectioners' sugar.