Banh Chung (Square rice cake) is a traditional Vietnamese rice cake which is made from glutinous rice, green beans, pork and other ingredients.

Its origin is told by the legend of Lang Liêu- the son of 6th Hung King. Hung King wanted to find the one to inherit his position and sit on the throne to lead the country when he was too old. Therefore, he held a cooking contest for his 21 sons, and who could fully satisfy his taste would be the next King. Most princes go everywhere to find special, exotic and far-fetched food, except for Lang Lieu – the 18th son of Hung King, also the poorest and loneliest since he lost his mother at a young age. Not having enough money to buy delicacies, Lieu just stayed around his house.