In a small bowl, cream butter and 3/4 cup confectioners' sugar until light and fluffy. Beat in extract. Gradually add flour and mix well. Stir in macadamia nuts, ginger and lemon zest.
Shape into 1-in. balls; place 1 in. apart on greased baking sheets. Bake at 350° for 13-15 minutes or until the bottoms are lightly browned. Roll warm cookies in confectioners' sugar; cool on wire racks. When completely cool, roll again in sugar.
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