• Preheat oven to 350 degrees F. Line a 9x9 square baking dish with parchment paper or tin-foil and spray with nonstick baking spray. Set aside.

Graham Cracker Crust

• Make the crust by mixing graham cracker crumbs, melted butter and optional-sugar (if desired) together and firmly press the crumbs into the bottom of the prepared pan.
• Place in the oven and bake for 15 minutes.
• Remove graham cracker crust from oven.

Coconut Layer

• Spread the shredded coconut on top of the graham cracker crust.
• Pour the sweetened condensed milk on top of the coconut.
• Place in the oven and bake for another 15 minutes.

Chocolate Layer

• In a microwave-safe bowl, add the chocolate chips and microwave in 30-second intervals, stirring between each interval until melted.
• Once the chocolate is melted, spread the melted chocolate over the top of your bars. Option: You can also add in nuts, pretzels or whatever add-ins you wish to the melted chocolate or add them to the top of the chocolate.
• Place bars in the fridge to cool completely, so the chocolate completely sets up, about 2-3 hours to fully harden.
• Once bars are chilled and set up, lift out the bars using the sides of the tin-foil or parchment paper onto a cutting board.
• Cut the bars into squares as big or smaller if you wish.
• Store covered or in an airtight container in the fridge. They're best serve chilled.