Rinse black sticky rice and drain.

Place rice in a large saucepan.

Add water to cover the rice, removing any floating grains.

Bring to a boil over high heat, then reduce heat to a simmer.

Simmer for about 45 minutes, uncovered, stirring occasionally, until rice is tender.

Add more water if needed, or pour some off to maintain water level just below rice level.

Add coconut milk, sugar, and salt.

Continue cooking until the mixture reaches a pudding-like consistency.

Sprinkle sweetened flaked coconut over the top, if desired.

Serve warm.