Congee is a form of savoury rice porridge made by boiling rice in a large amount of water until the rice softens. Depending on rice-water ratio, the thickness of congee varies from a Western oatmeal porridge to a gruel. Since the history of rice cultivation in Asia stretches back to the Baiyue-inhabited lower Yangtze circa 10000 BC, congee is unlikely to have appeared before that date. Congee is typically served with side dishes, or it can be topped with meat, fish and pickled vegetables.

Porridge is a food made by heating or boiling ground, crushed or chopped starchy plants, typically grain, in milk or water. It is often cooked or served with added flavourings such as sugar, honey, fruit, or syrup to make a sweet cereal, or it can be mixed with spices, meat, or vegetables to make a savoury dish. It is usually served hot in a bowl, depending on its consistency. Oat porridge, or oatmeal, is one of the most common types of porridge. Gruel is a thinner version of porridge and congee is a savoury variation of porridge of Asian origin.