Happy Cookie Bars

½ cup butter
1 ½ cups graham cracker crumbs
1 can sweetened condensed milk
1 cup semisweet chocolate chips
1 ¼ cups sweetened flaked coconut
1 cup chopped nuts

Preheat oven to 350 degrees F. In a 13×9-inch baking pan, melt butter in oven. Sprinkle crumbs over melted butter; mix and press into pan. Pour sweetened condensed milk evenly over crumbs. Sprinkle with chocolate chips, coconut, and nuts; press down firmly. Bake 25-30 minutes or until lightly browned. Cool completely before cutting into 24 bars. Store in covered container.