Process pecans and wafers separately. combine in food processor with sugar.
Slowly pour in liqueur until mixture forms a ball. You might not need the whole amount. (If mixture gets too wet, put it in the refrigerator, uncovered, overnight to dry out some.)
Shape into small balls. roll in additional finely chopped pecans.
Store in tightly sealed container.
Notes: You can substitute Oreos for the wafers, and use only 1 1/3 cup confectioners sugar.
