Mix the pudding powder with the sugar and stir in approx. 100 ml coconut milk until smooth. Dilute the remaining coconut milk with approx. 300 ml of water and pour it into a saucepan. Stir in the mixed pudding powder and cook for at least 1 minute while stirring.
Pour the pudding into dessert glasses and place in the refrigerator for at least 3 hours.
Before eating, take the mango pieces out of the freezer and puree. Spread the mango on the pudding and decorate with the desiccated coconut.