Preheat the oven to 350 degrees. Line a 9x13 pan with parchment paper and spray with nonstick cooking spray. Set it aside.
Stir melted butter and graham cracker crumbs together. Press evenly into the bottom of the prepared pan using the back of a flat measuring cup.
Top graham cracker crust with chocolate chips, butterscotch chips, pecans, and shredded coconut. Then evenly drizzle the entire thing with sweetened condensed milk. Use the back of a spoon or butter knife to evenly distribute.
Bake for 25 minutes or until the bars are set and the edges have slightly browned. Cool completely then cut into 20 even bars.