Mix confectioners' sugar, pecans, butter and creme
de menthe in medium bowl until well blended.
Cover and refrigerate until firm, about 30 minutes.
Line a large baking sheet with foil.
Shape pecan mixture into 1 ¼" round balls and place on sheet.
Refrigerate until firm, about 15 minutes.
Dip half of each ball into melted chocolate; return to sheet.
Refrigerate until set, about 1 hour.
(Can be prepared ahead.
Place in airtight container and
refrigerate five days or freeze up to one month.)