2Place butter in 13 x 9 inch pan and melt in oven. Swirl to coat bottom and sides with butter.
3Spread graham cracker crumbs evenly over bottom of pan. Layer chocolate chips, butterscotch chips, and nuts over crumbs. Pour condensed milk over nuts. Sprinkle coconut over condensed milk.
4Bake until edges are golden brown, about 25 minutes. Let cool before cutting into bars.
Footnotes
Tip
Aluminum foil can be used to keep food moist, cook it evenly, and make clean-up easier.