Preparation

• Line  9-inch square pan with foil, with ends of foil extending over sides. Arrange wafers in single layer on bottom of prepared pan.
• Microwave  2 cups marshmallows, milk chocolate and milk in microwaveable bowl on HIGH 2 to 3 min. or until marshmallows are completely melted and mixture is well blended, stirring after 1-1/2 min. Cool.
• Add  whipped topping, chopped cookies, nuts and remaining marshmallows to chocolate mixture; stir until blended. Carefully spread over wafers in pan.
• Freeze  several hours or until firm. Use foil handles to remove dessert from pan before cutting to serve.