Add enough water to reach a bit under the water line in the rice cooker (if you’re cooking in a pot on the stove use a little bit less water than what you’d normally use to cook rice). You want the rice to be just a bit undercooked.
Wait for the rice to cook. Again you don’t want the rice mushy, you want it a bit undercooked.
Meanwhile oil a 9×13 baking pan well, bottom and all sides. Set aside.
Place brown sugar and coconut milk in a pot and bring to a boil, stir constantly so the coconut milk and sugar combine well and is smooth. Set aside.
When rice is done put it in the baking pan and smooth out evenly.
Pour the coconut mixture over all.
Bake in a pre-heated 350º oven for about 1 hour or until all the liquid thickens. The top will bubble as it bakes.