They are basically the same -- throw oats, a liquid, dash of salt, optional dried fruits or nuts, and a flavoring if you'd like, into the cooker and press on. Whenever the cooker shuts off or turns to "warm", you have piping hot, smooth and creamy oatmeal. The trick is to figure out the ratio of liquid to oats. RealSimple says "add a little less milk or water than you would for stovetop cooking (and some chopped nuts and dried fruit if you want)." I ended up taking bits of several recipes but mostly followed this from Cuisinart:
2 cups (Rice Cooker) rolled oats(not quick cooking)
3 cups
¼ teaspoon salt
Insert bowl in
Note: Other dried fruits may be substituted for the raisins. Try dried cherries, cranberries or blueberries,slivered dried apricots or plums or chopped dried apples.
Note 2: Leftovers can be refrigerated and microwaved (with the addition of some extra liquid) during the rest of the week. I added some water and milk, stirred it up, dropped in dried fruit, and microwaved for 3 minutes (stirring once between). The second time around it didn't taste as apple-y, and it wasn't very sweet, but the dried fruit was a great addition. The next time I have leftovers I want to cut them into squares and pan-fry them in some butter and see what happens.
TECHNICALITIES
Our ricecooker is a generic 10 cup version with a non-stick bowl (if you have an old rice cooker, you may have use some non-stick spray on the inside of the bowl). I'm also not sure if this works with smaller ricecookers which may bubble over, from what I've read. I've also read about the amazing results from the "porridge" setting on Zojirushi Fuzzy Logic cookers but the results are great with our simple one button cooker that I don't feel the need to buy a new one nor would I want to spend so much for one.
My next try is Irish oats, aka steel cut. I think it's chewier, which Dear would probably like because he thinks this version is mushy. And because they need to be soaked, I can put everything in the rice cooker the night before and set the timer to start an hour before I get up (so that I don't need to wait around, like I did this time).