Melt butter in a 9" x 13" glass baking dish. Sprinkle graham cracker crumbs evenly over the melted butter. Drizzle sweetened condensed milk over the cracker crumbs. Sprinkle the chocolate chips, coconut, and nuts evenly over the milk. Bake in a 350 oven for 15-20 minutes until lightly browned. While still warm, press down lightly with a spatula all over the cookie mixture. Allow to cool completely before cutting.

Optional: Add a layer of butterscotch morsels to make Seven Layer Bars