Organic Oat Groats (or in some cases, “berries”) are the hulled kernels of various cereal grains such as oat, wheat, rye, and barley. Groats are whole grains that include the cereal germ and fiber-rich bran portion of the grain, as well as the endosperm (which is the usual product of milling). There is one thing they all have in common nutritional value. Steel-cut, rolled, and instant oats all have the same nutritional profile since they’re all made from whole oat groats.