Dried soba noodles refers to a noodle specialty of northern Japan, but used in Vietnamese cooking. Dried soba noodles are beige-colored noodles, made from a mixture of buckwheat and wheat flours. Some are even lightly flavored with green tea or beetroot. They are cooked in simmering water, then rinsed in cold water to cool before use. The boodles are served either hot in a broth or cold with a dipping sauce.