Preheat the oven to 350 degrees.
Carefully line a 8" square pan with parchment. This is a sticky recipe.
In a small bowl, place the graham cracker crumbs and add the melted butter to it. Mix well till the mixture is sandy.
Press the graham cracker mix into the bottom of the pan, packing it well.
Next, open the can of sweetened condensed milk and dump it overtop the graham cracker crust. Spread it out all over the base.
Next, scatter the coconut over the sweetened condensed milk in an even layer.
Next, scatter the nuts over, and finally the chocolate.
Finish with a sprinkling of flaky sea salt.
Bake in the preheated oven for 20-25 minutes, until the top is starting to be golden.
Remove from oven and cool completely. Allowing to cool (even putting it in the fridge) will allow you to slice it more easily. Use the parchment to remove from the pan and slice into 12 pieces.