Melt butter in the microwave safe bowl . Add the graham cracker crumbs, stirring until they are thoroughly combined. Wet your fingers a little bit. Pour the mixture into the 9 x 13 pan and press down with your wet fingers, forming a bottom layer.
Sprinkle coconut, marshmallows, nuts, and candy chips, in that order, over top.
Drizzle over all the condensed milk (open can with opener and scoop out the contents as milk is very thick.)
Bake for 30 to 35 minutes, until well browned. Cool in pan on a rack. Using a wet knife, cut into small bars. Recipe makes about four dozen cookies.