Super Layered Snack Bars

Heat oven to 350°F (175°C). Grease a 13 x 9 x 2-inch baking pan; set aside. In a large bowl, combine wafer crumbs, 1/2 cup cocoa and sugar; cut in 3/4 cup butter with pastry blender until mixture is crumbly. Press evenly on bottom and 1/2-inch up sides of prepared pan. Sprinkle marshmallows and coconut over chocolate layer. Combine sweetened condensed milk, remaining 1/2 cup cocoa and remaining 1/4 cup butter in microwave-safe bowl. Microwave at HIGH (100%) for 1 to 1 1/2 minutes or until mixture is smooth when stirred; pour evenly over coconut. Sprinkle evenly with nuts and crushed pretzels; press down firmly. Bake 25 to 30 minutes or until done. Cool completely; cut into bars.