1. Preheat the oven to 350°F (175°C). Line an 8x8-inch baking pan with parchment paper or lightly grease it.
2. Make the crust: In a bowl, mix the graham cracker crumbs with the melted butter until evenly combined. Press firmly into the bottom of the prepared pan.
3. Add the toppings: Evenly sprinkle the chopped almonds, dark chocolate chunks, and coconut flakes over the crust.
4. Finish with condensed milk: Slowly pour the sweetened condensed milk evenly over the entire pan.
5. Bake for 30 minutes, or until the top is lightly golden and set.
6. Cool completely before slicing into bars (this helps them firm up cleanly).