Mix cookie crumbs and butter; press onto bottom of 8-inch square pan.
Add milk gradually to peanut butter in large bowl, stirring with whisk until well blended.
Add dry pudding mixes; beat 2 min. (
Mixture will be thick.) Stir in 1 cup COOL WHIP.
Spread onto crust; cover with remaining COOL WHIP.
Refrigerate 3 hours or until firm. When ready to serve, microwave fudge topping as directed on package; drizzle over dessert. Top with peanut butter pieces.