1. In a large bowl combine 450g of ground biscuits and 120g of powdered sugar.  Mix well with a spoon to combine the ingredients and ensure there are no sugar lumps.

2. Melt 100g of chocolate and 100g of butter over low heat or in the microwave. Stir until you get a smooth, glossy glaze.

3. Add the melted chocolate and butter mixture to the bowl with the biscuits. Add rum as well. Then, gradually start adding the orange juice (or Fanta). 

Important Tip: Do not pour all the juice at once! The amount of liquid needed depends on the dryness of the biscuits you use. Pour in half a cup, mix with your hand or a wooden spoon, then add the rest as needed until you get a mixture that is compact and easy to shape, but not too sticky.

1. When the mixture is uniform, cover the bowl with plastic wrap. Leave it in the fridge for at least 30 minutes to an hour. This is a crucial step – the cold mixture is much easier to shape, and the balls will be more uniform.

2. Take the mixture out of the fridge. Take small amounts of the mixture and form balls the desired size with your palms (walnut size is ideal). Immediately roll each ball in desiccated coconut while the surface is still slightly moist so the coconut sticks nicely.

3. Arrange the balls on a tray and return them to the fridge to set completely before serving. Store them in a cool place.