Prepare the Dry Ingredients:

In a large bowl, combine the ground biscuits, finely chopped nuts, powdered sugar, and cocoa powder. Mix well to ensure all the dry ingredients are evenly distributed.

Add Wet Ingredients:

Add the melted butter, milk, and vanilla extract to the dry mixture. Stir until everything is well combined and forms a sticky dough.

Shape the Truffles:

Take small portions of the mixture and roll them into bite-sized balls using your hands. If the mixture is too sticky, you can lightly dust your hands with cocoa powder.

Coat the Truffles:

Roll each truffle in desiccated coconut (if using) to coat them evenly. This adds a nice texture and enhances the flavor.

Chill:

Place the truffles on a tray lined with parchment paper and refrigerate for at least an hour. This helps them firm up and enhances their flavor.