1. It is better to soak the rice overnight to reduce cooking time.
2. Using the Instant pot also helps reduce the cooking time a lot. It was perfectly done in the Instant pot in 10 minutes, whereas with normal cooking it would have taken at least 30 minutes.
3. Use only 100 % pure coconut milk such as Aroy-D or any other but without any preservatives or guar gum. If it is hard to find a good brand that carries 100% pure coconut milk then extract it yourself by grinding the coconut and then straining the milk.
4. Enjoy the black rice porridge with sweet ripe mangoes.