Flakes cereal is a popular breakfast food that comes in many varieties. The two most common types are BRAN Flakes and OAT Flakes. BRAN Flakes are made from wheat BRAN, which is the outer layer of the wheat grain. They are high in fiber and have a nutty flavor. OAT Flakes are made from oats and are also high in fiber. They have a mild, sweet flavor and are often used in baking. Both types of flakes cereal are a great way to start the day.