Mien threads are very long and tough, made from a kind of tuber plant called cassava. When served, the long tiny flour threads are cut into smaller pieces. Like rice vermicelli, this kind of cassava vermicelli is used to make several different dishes, the most popular being Mien Ga (chicken cassava vermicelli), Mien Bo (beef cassava vermicelli), and Mien Luon (eel cassava vermicelli).
Cassava vermicelli is also used for different dishes which are stirred in oil, such as Mien Xao Thit (vermicelli and pork stirred in fat), Mien Xao Long Ga (vermicelli and chicken tripe stirred in fat), and Mien Xao Cua Be (vermicelli and sea crab meat stirred in fat).