Pour the melted butter into a 9×13 inch baking pan, spreading it evenly.
Sprinkle the graham cracker crumbs over the butter to form an even layer.
3. Add the Sweetened Condensed Milk
Pour the sweetened condensed milk evenly over the graham cracker crumbs.
4. Layer the Toppings
Layer the ingredients one by one: chocolate chips, butterscotch chips, chopped walnuts, and shredded coconut. Spread each layer evenly for the best texture and flavor distribution.
5. Bake
Place the pan in the preheated oven and bake for 25-30 minutes, or until the top is lightly browned and the edges are set.
6. Cool and Serve
Allow the bars to cool completely in the pan before cutting them into squares or rectangles.