Heat oven to 350 degrees (325 degrees for glass dish). Coat 13 x 9 inch baking pan with no-stick cooking spray. Line with parchment paper.
Combine graham cracker crumbs and butter. Press into bottom of prepared pan. Pour sweetened condensed milk evenly over crumb mixture. Layer evenly with chips, coconut, and nuts. Press down firmly with a fork.
Bake 15-25 minutes or until lightly browned. Cool completely. Cut into bars. Store covered at room temperature.