Line 6 muffin cups with paper baking cups; place 1 vanilla wafer in bottom of
each cup.
Beat cream cheese and powdered sugar at medium speed with an electric mixer
until smooth. Stir in milk, lime rind, and juice. Fold in whipped topping;
spoon into baking cups. Stand 3 vanilla wafers around edge of each cup.
Freeze until firm. Makes 6 servings.