Pour milk into large bowl. Add dry pudding mix. Beat with wire whisk 2 minutes or until well blended. Gently stir in 1 1/2 cups of the whipped topping and the chopped cookies. Spoon into pie crust. Spread with remaining 1/2 cup whipped topping.
Melt chocolate as directed on package; drizzle over pie.
Refrigerate 2 hours or more until firm. Store leftovers in refrigerator.