Bun Rieu Cua Crab Noodle Soup

bun rieu

During the winter crab season we took full advantage, making sup mang cua (asparagus and crab soup) using fresh dungeness crabs. But we also had some king crab meat given to us by The Food Addicts and so we made some bun rieu (crab noodle soup). This soup is very hearty and great during the winter months as it combines some of our favorite ingredients of tomatoes, tofu, and crab.

Traditionally this soup is made with whole blue crabs which are then pounded in a large mortar/pestle. The crab meat is separated from the crushed body. The body of the crushed crab is then put into a fine mesh cloth or sieve and water is then strained through, forming the base of the broth. Do I make my bun rieu this way? Heck no!! It’s too time consuming! 🙂 But when Hong was growing up, he would help his mom make bun rieu this way. The result of is a much more intense crab flavored broth.  Almost everyone I know uses a can of minced crab in spices as a substitute for this labor intensive process.

So if Hong wants his bun rieu to taste like his mom, he better do the extra work. 🙂 For me, a good and easy alternative is to use the minced crab in a can and add that to my all purpose pork broth that I use to make many of my soups. But if I’m really pressed for time, canned chicken broth will also do.

Unlike pho or bun bo hue where there are slices of meat added, the key protein component to this soup is the crab meat mixture, rieu, made of the minced crab (or alternatively dried shrimp), ground, pork and egg.  It’s essentially a Vietnamese version of crab cakes but in a soup! Some cooks like crab mixture more formed, almost like a meatball or patty. While we like it more airy and loose, like pillowy mounds of deliciousness. You can adjust how you like it by the ratio of egg to meat in the recipe below—the more airy and soft, the more egg and less ground pork. Another key ingredient in this mixture is  shrimp paste for that extra umami. Other variations of this soup includes oc/periwinkle called bun oc.

Here’s a quick video on how to make this simple yet delicious soup!

bun rieu
rau muong

Serve bun rieu with plenty of fresh herbs and veggies. Common accompaniments include:

  • chopped green onion and cilantro
  • perilla, mint, lime wedges
  • bean sprouts
  • split water spinach/ong choy/kang kong/rau muong stems
  • fine shrimp paste

To make the split rau muong, there’s a very very high tech process…in the form of a $2 utensil you see above. It’s composed of a thin rod and at the end, a sharp turbine like cutting edge. Pluck the leaves of the rau muong and insert the long metal rod into the stem opening. With one hand hold the device at the top and with the other, grab the stem and with a quick fluid motion, push the stem through the blade opening. These special devices are often sold at the Asian markets and are so handy in making perfectly split rau moung stems which gives bun rieu a refreshing crunch.

bun rieu
With crab season and the cold weather we’ve been having lately, bun rieu is a great soup to enjoy. But honestly, it’s so delicious and not labor intensive that we enjoy eating this soup year round and think you will too.
bowl of bun rieu

Bun Rieu Vietnamese Crab Noodle Soup

A beloved noodle soup that's just as delicious as pho but not quite as well known. Give this easy recipe a try!
Prep Time: 30 minutes
Cook Time: 30 minutes
Course: Main Course
Cuisine: Vietnamese
Keyword: bun rieu, crab, noodle soup
Servings: 6
Calories: 819kcal
Author: Hong and Kim


  • 5 qt stock pork or chicken
  • 1 can of minced crab in spices many brands available,should say "gia vi nau bun rieu" on it
  • 4 eggs
  • 6 oz crab meat fresh or canned/frozen drained
  • 1/4 lb dried shrimp
  • 1/4 lb of ground pork
  • 1 tsp black pepper ground
  • 1 tsp fine shrimp paste
  • 4 ripe tomatoes quartered or 1 large 16 oz can whole tomatoes
  • 10 fried firm tofu pieces whole or halved
  • 1 tbsp of annato seeds
  • 4 tbsp oil canola or vegetable
  • 4 tbs scallions chopped 1 inch


  • vermicelli noodles
  • lettuce finely chopped


  • Vietnamese herbs mint, lemon balm, split ong choy stems
  • cilantro chopped
  • scallions chopped
  • lime wedges
  • fine shrimp paste optional
  • beansprouts


  • Soak dried shrimps until softened with hot water for about 30 min to 1 hr, then mince finely until fluffy using food processor or minifood chopper and set aside. This can be done day in advance and refrigerated.
  • Cook the vermicelli noodles and set aside.
  • In small sauce pan, heat canola or vegetable oil with the annato seeds over medium heat. When the seeds release their red color, remove the seeds with strainer. (You can prepare this oil in larger quantities in advance and keeps months refrigerated). Add the scallions and turn off heat and set aside.
  • At the same time add pork or chicken stock into large pot and bring to boil.
  • In the meantime, make the crab mixture. Combine ground pork, can of prawn/crabmeat in spices, shallots, fine shrimp paste, dried shrimps, pepper, and egg into a food processor. Pulse for about 30 seconds until it becomes a fine paste. Add the crabmeat to combine. When the stock comes to a boil, turn down to simmer and slowly add this crab mixture into stock by the ladle full. The crab mixture will sink but as it cooks will float. Now add the tomatoes and tofu and cook until tomatoes are tender. Finally, season stock with additional fish sauce (or shrimp paste) as needed. Garnish with annato scallion oil.
  • Add vermicelli noodles to bowl and ladle on the bun rieu. Serve with vegetable and herbs and enjoy!


 The crab paste mix is soft and pillowy but stays together. If you like it more loose, add an additional egg or decrease the ground pork in half. Annatto seed oil (without the scallions) can be made in larger quantities and stored in fridge for months. If using prepared annatto seed oil, simply heat and stir in scallions.


Sodium: 4129mg | Calcium: 938mg | Vitamin C: 14mg | Vitamin A: 2541IU | Sugar: 11g | Fiber: 6g | Potassium: 293mg | Cholesterol: 336mg | Calories: 819kcal | Saturated Fat: 5g | Fat: 42g | Protein: 83g | Carbohydrates: 29g | Iron: 10mg
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