Cut the creamed coconut into small pieces or shred and put it in a small microwave safe bowl with the sugar.
Melt in the microwave for a minute or two minutes on a medium power. Every microwave is different so you need to check often to make sure the coconut is not burning! Stir sometimes.
Add the cocoa powder in the melted coconut mixture and stir to combine.
Add in the vanilla extract, stir and then pour in the milk. Mix well to combine.
Put the mixture in a small container (I used a small ceramic bowl with a flat bottom 6 inch in diameter) and smoothen and even the top with back of a spoon.
Put in the fridge for about 1 hour and cut into small cubes to serve. The leftovers can be stored in an airtight container in the fridge up to a week.
Notes
*Creamed coconut can be found in major supermarkets or Asian shops. It's a concentrated coconut block.