melt coconut oil and chocolate
Add coconut oil and chocolate chunks to a heatproof bowl. Place in the microwave for a couple of seconds for the ingredients to melt. Or place over a saucepan filled with boiling water (make sure the bowl doesn't touch the water) and set over medium heat for the ingredients to melt.
combine all the ingredients
In a large bowl, combine ground biscuits, icing sugar, unsweetened cacao powder, rum, a pinch of salt, and melted chocolate mixture. Stir to get a combined batter.
shape into balls
Shape the batter into 24 chocolate rum balls, then roll them in the rest of the ground biscuits. Serve immediately or store at room temperature or in a fridge.