Maple Macadamia Nut Cookies Recipe

In a large bowl, cream butter and confectioners' sugar. Beat in the egg, maple flavoring and vanilla. Combine the flour, baking soda and cream of tartar; gradually add to the creamed mixture. Stir in the oats, chips and nuts. Drop by heaping teaspoonfuls 2 in. apart onto greased baking sheets. Bake at 350° for 10-12 minutes or until lightly browned. Remove to wire racks to cool. In a bowl, combine icing ingredients until smooth; drizzle over cookies. Store in the refrigerator. Yield: About 4-1/2 dozen.