"Rolled oats are great for cookies and granola, but when it comes to a proper porridge what you want are steel-cut oats. These also go by the names pinhead, Scottish, Irish, coarse-cut or porridge oats. Unlike rolled oats, which have been steamed and then rolled flat into a flake, steel-cut oats are the raw grain (a groat when you're talking oats), very coarsely ground--chopped or cracked, really. This makes for a much chewier, firmer textured porridge with a nutty, full-bodied flavor. One bowl of steel-cut oat porridge and you'll be a believer."