Pre-heat oven to 350 degrees. Spray 13×9 baking pan with no-stick cooking spray. (other alternatives: line with aluminum foil sprayed with no-stick spray or parchment paper)
Combine graham crack crumbs and butter; mix well. Press crumb mixture firmly onto the bottom of a prepared pan.
Pour sweetened condensed milk on top of crumbs.
Evenly layer butterscotch and chocolate chips. Sprinkle with nuts; and top with coconut. Press firmly with a fork.
Bake 25 to 30 minutes or until lightly golden brown. Loosen the sides of bars from the pan by running a knife along the edges while still warm. Cool in pan on wire rack. Cut into bars.
Recipe by Sweet Dash of Sass at https://sweetdashofsass.com/2013/12/magic-layer-bars/