Feel free to use whichever grain you'd like. Keep in mind if using brown rice, it must be cooled appropriately by letting it cool quickly and then immediately put it into the fridge. We recommend spreading the rice onto a large plate or baking tray for faster cooling, rather than keeping it in the pan. Then, as soon as it's cooled, put it into an airtight container in the fridge — never let it sit at room temperature.