Abstract: A microwave oat cereal, a method of its manufacture, and a method of its consumer-preparation is disclosed.A one-ounce single serving of the product of this invention can be fully cooked in a microwave oven in a single serving bowl without foam-over. The cereal comprises a mixture of an oat cereal pieces, such as oat flakes, or oat bran, and a small amount of lecithin, preferably in the form of a powder and preferably in the form of discrete solid encapsulated lecithin. The lecithin is present in an amount effective to prevent foaming out of a single serving bowl when a single serving of the mixture is cooked with water in a microwave oven. Also, the lecithin may be affixed to the surface of the oat cereal such as by spraying, or by allowing encapsulated lecithin to contact the cereal while the cereal is at temperature above the melting point of the encapsulated lecithin.