Bún riêu is a crab-based Vietnamese noodle soup. The dish is made in several versions, but the most popular one is made with a tomato base and goes under the name bún riêu cua. The soups are prepared with different broths, but they are always infused with crab paste and come served with vermicelli noodles, while the toppings typically include crab meat, pork, tofu, tomatoes, blood jelly, and a selection of fresh greens such as perilla or bean sprouts.

The combination of sweet and sour flavors make bún riêu one of the favorite noodle dishes in the country.