Rinse and drain black rice, place into a pot, add in 3/4 c - 1 c sugar (depending how sweet you like your porridge to be. Sugar can be regular, brown, or coconut palm sugar), stir. Pour in 6 cups of water, bring to boil on high heat, stirring often. Turn down to medium heat and let simmer until rice is super soft, turning into porridge. Mixture may splatter so please be careful as it is very hot. Adding more cups of water (12-20 cups) as needed while cooking to turn rice into porridge.