Combine the coconut sugar in a bowl with the boiling water to create a coconut sugar syrup.
Melt cacao butter in a saucepan. Meanwhile, combine cacao powder and coconut milk powder in another bowl. Add 5 tablespoons of the coconut syrup and dry ingredients to the cacao butter. Stir gently.
Remove chocolate from heat and divide into four separate ramekins (skip this if only making one flavour). Add your desired flavours to each. Pour into the chocolate bar mould and sprinkle with toppings.
Place in the fridge to set for at least 2 hours. Either wrap and gift or enjoy straight from the fridge!