Cynthia, I can answer this for you, since all I ever use is brown rice (haven't bought white rice in probably 7 years). You can absolutely use brown rice instead of white in any recipe, but when it's baking in a casserole, you need to help it get a jump start by boiling the rice in a pot of water for about 5 minutes (no need to measure out the water) then drain it and add it to your casserole...continue on with recipe as normal. Hope this helps!!
April