Bánh bao is a ball-shaped bun containing pork
and vegetables, in Vietnamese cuisine. It often has Chinese sausage and a portion of a hard-boiled egg inside. Bánh bao are generally smaller than baozi, and are filled with savory fillings, the most popular of which is seasoned ground pork. A vegetarian version of bánh bao also exists.
The dish originated with the baozi from China but was adapted by the Vietnamese and is also available in most other countries with significant Vietnamese populations. As in China, pork is the most popular kind of meat in Vietnam.
Bánh bao is an old fashioned Cantonese dim sum called tai pao brought to Vietnam by Cantonese immigrants. It was invented during the hardship days of old China to feed the ordinary people.