Melt butter in 13x9-inch baking pan in oven; remove from oven. Sprinkle graham cracker crumbs over butter. Stir well; press onto bottom of pan. pour sweetened condensed milk evenly over crumbs. Sprinkle with morsels, coconut and nuts; press down firmly.
Bake in preheated 350F oven for 25-30 minutes or until light golden brown. Cool completely in pan on wire rack.