1. Prepare CHOCOLATE CRUMB CRUST.
2. Beat cream cheese in medium bowl until fluffy. Gradually add sugar, beating until well blended. Add cocoa alternately with milk, beating until smooth. Gradually fold in 3 cups whipped topping; spoon mixture over crumb crust.
3. Stir together remaining 2 cups whipped topping, peppermint extract and food color in small bowl; spread over chocolate layer. Cover; refrigerate about 6 hours or until set. Cut into squares. Garnish with mint leaves, if desired. Cover; refrigerate leftover dessert. 6 to 9 servings.
CHOCOLATE CRUMB CRUST: Combine 1 cup graham cracker crumbs, 1/4 cup sugar, 1/4 cup HERSHEY'S Cocoa and 5 tablespoons melted butter or margarine in small bowl; stir until well blended. Press mixture onto bottom of 9-inch square pan.