Make Ahead S’Mores Cake

Combine graham cracker crumbs, melted margarine and sugar in medium bowl; press into 13 x 9-inch (33 x 23-cm) glass or ceramic baking dish. Microwave chocolate chips, 2 cups (500 mL) marshmallows and milk in small microwave-safe bowl at HIGH 4 minutes or until completely melted, stirring once. Cool 10 minutes, then stir in remaining 2 cups (500 mL) marshmallows. Spread over crust; freeze 1 hour or until firm. Sprinkle crumbled graham crackers over chocolate layer. Cut carton from Breyers® Classic Chocolate with scissors. Arrange Frozen Dessert on its side, then cut crosswise into 4 slices. Arrange slices in baking dish, pressing to form an even layer. Cover and freeze 4 hours or overnight. Frost with whipped topping just before serving. Sprinkle, if desired, with additional graham cracker crumbs. n