HEAT oven 350°F. Spray a 13 x 9-inch baking pan with no-stick cooking spray.
COMBINE graham cracker crumbs and butter. Press into bottom of prepared pan. Pour sweetened condensed milk evenly over crumb mixture. Layer evenly with remaining ingredients; press down firmly with fork.
BAKE 25 to 30 minutes or until lightly browned. Loosen from sides of pan while still warm; cool on wire rack. Cut into bars or diamonds.
For perfectly cut cookie bars, line entire pan with foil extending foil over edge of pan. Coat lightly with no-stick cooking spray. After bars have baked and cooled, lift up with edges of foil to remove from pan. Cut into individual bars.
