Hot Chocolate-Peppermint Mallow Squares

Line 9-inch square pan with foil, with ends of foil extending over sides; spray with cooking spray.

Microwave butter in large microwaveable bowl on HIGH 45 sec. or until melted. Add marshmallows; toss to coat. Microwave 1-1/2 min. or until marshmallows are completely melted and mixture is well blended, stirring after 45 sec. Add hot cocoa mix; stir until blended.

Reserve 2 tsp. crushed candy. Add remaining crushed candy and graham pieces to marshmallow mixture; mix well.

Press graham mixture onto bottom of prepared pan; sprinkle with reserved crushed candy. Drizzle with melted chocolate.

Refrigerate 1 hour. Use foil handles to remove dessert from pan before cutting to serve.