Begin by preheating your oven to 350°F (175°C). Grease your 9x13 inch baking pan with a little butter or line it with parchment paper for easy removal.
In a mixing bowl, combine the melted butter and graham cracker crumbs. Stir until the crumbs are fully coated in butter. Press this mixture evenly into the bottom of the prepared baking pan to form a crust.
Sprinkle the semi-sweet chocolate chips and butterscotch chips evenly over the crust.
In a microwave-safe bowl, combine the unwrapped Werthers Original Soft Caramels and the tablespoon of half-and-half (or cream). Microwave in 20-second intervals, stirring in between, until melted and smooth. Drizzle this luscious caramel over the chocolate and butterscotch layers.
Evenly sprinkle the sweetened shredded coconut flakes over the melted caramel layer.
Pour about two-thirds of the can of sweetened condensed milk over the coconut, ensuring it covers the entire surface. This will bind all the ingredients together as it bakes.
Sprinkle the salt over the top of the bars to enhance the flavors and add that irresistible salty-sweet element.
Place the pan in the preheated oven and bake for 25-30 minutes, or until the edges are golden brown and the center is set but still slightly gooey.
Allow the bars to cool in the pan for at least 30 minutes before cutting into squares. This will help them hold their shape.