From discovery.com: World’s oldest cooked cereal was instant.

European diners around 8,000 years ago could enjoy a bowl of instant wheat cereal that, aside from uneven cooking and maybe a few extra lumps, wasn’t very different from hot wheat cereals served today, suggests a new study that describes the world’s oldest known cooked cereal.

Dating from between 5920 to 5730 B.C., the ancient cereal consisted of parboiled bulgur wheat that Early Neolithic Bulgarians could refresh in minutes with hot water.

"People boiled the grain, dried it, removed the bran and [continue].