High starch foods include cereals, such as rice, millet, wheat, corn, oats, buckwheat, barley, these cereals are often rich in starch. Foods high in starch and potato foods, such as sweet potatoes, white potatoes, purple potatoes, these potato foods often also contain a lot of starch. High starch food and some root vegetables, such as potatoes, taro, these root vegetables are often very rich in starch.