Preheat oven to 350.
Place butter in 8x11 or 9x13 inch baking pan and melt in oven.
Remove pan from oven and firmly pressed graham cracker crumbs onto melted butter.
Layer the ingredients – chocolate chips, Reese’s cups, and walnuts.
Pour sweetened condensed milk over the entire pan.
Sprinkle coconut on top and bake for 25-30 minutes.