Grind rice into a high-speed blender or grinder and blend until a coarse powder.
In a saucepan or pot, bring coconut milk and water to a boil. Reduce heat to medium-low, gradually add the rice, stirring often.
Then, stir in the ground cinnamon, and brown sugar. Stir and simmer until thick and creamy - about 5-10 minutes. Taste for texture and flavor check. If the rice hasn't cooked down enough, add a bit more water/milk and cook for a bit longer.
Serve and top with your favorite toppings!
Notes
For a creamier texture, simmer for a little longer. For a more runny texture, add more liquid (water/non-dairy milk).
If the rice doesn't have a soft texture, cook for another 5 minutes on low. This could happen if rice was not blended down completely.