MIX crushed cookies and margarine; press firmly onto bottom of 8-inch square pan.
PLACE peanut butter in large bowl. Gradually add milk, stirring with wire whisk until well blended. Add dry pudding mixes. Beat 2 min. or until well blended. (Mixture will be thick.) Stir in 1 cup of the whipped topping. Spread onto prepared crust; top evenly with remaining 1 cup whipped topping.
REFRIGERATE 3 hours or until set. When ready to serve, microwave fudge topping as directed on package; drizzle over dessert. Sprinkle with candies. Store leftovers in refrigerator.