Bún Riêu (Vietnamese Crab & Tomato Noodle Soup) Recipe

🍜 What makes Bún Riêu special?

Bún Riêu is best known for its light tomato broth and tender “riêu” (soft crab-and-egg clusters) served over rice vermicelli. It’s the kind of soup that tastes rich yet fresh: warm broth, a little tang, a touch of sweetness, and lots of herbs and crunchy vegetables added at the table.

Across Vietnam you’ll find many variations—some versions are punchier and more pungent, others sweeter or spicier. This recipe aims for a balanced, approachable bowl you can confidently cook at home.

🕒 Quick overview

• Serves: 4
• Prep time: 15 minutes
• Cook time: 30 minutes
• Difficulty: Medium (mostly timing and gentle simmering)

🛒 Ingredients

For the broth

• 1 liter (4 cups) chicken or pork stock (or water + a good-quality bouillon)
• 2 medium tomatoes, cut into wedges
• 1 small onion (or 2 shallots), thinly sliced
• 1 stalk lemongrass, bruised and cut into 2–3 pieces (optional)
• 2–3 tbsp fish sauce, to taste
• 1–2 tsp sugar, to balance
• 1–2 tbsp rice vinegar or juice of 1 lime (add gradually)
• 1 fresh chili, sliced (optional)
• Black pepper, to taste

For the “riêu” (crab clusters)

• 250–300 g crab meat (fresh, pasteurized, or canned; drained)
• 150 g ground pork (optional but traditional in many home versions; skip if you want a lighter bowl)
• 1 egg
• 2 tbsp finely sliced spring onion (scallion)

Noodles & bowl toppings

• 300–400 g rice vermicelli (bún)
• 200 g firm tofu, cubed (optional)
• Bean sprouts
• Fresh herbs: mint, coriander (cilantro), Thai basil (any combination)
• Lime wedges
• Fried shallots/onions (optional, for crunch)

🔥 Method (step by step)

1. Start the broth. In a pot, bring the stock to a gentle simmer. Add onion (and lemongrass if using). Simmer 5 minutes to soften the aroma.
2. Cook the tomatoes. Add tomatoes and simmer 8–10 minutes until they begin to slump and color the broth. Keep the heat at a steady simmer—avoid a hard boil.
3. Mix the riêu base. In a bowl, combine crab meat, ground pork (if using), egg, and spring onion. Mix gently until just combined. The mixture should be loose and spoonable (not a firm meatball paste).
4. Poach the crab clusters. Reduce heat so the broth is barely simmering. Spoon the crab mixture into the pot in small dollops. Let them set undisturbed for 2–3 minutes, then nudge gently so they don’t stick. Simmer 5–7 minutes until cooked through.
5. Add tofu (optional). Slide tofu into the pot and heat for 2–3 minutes.
6. Season for balance. Add fish sauce, sugar, and chili (optional). Add vinegar or lime juice a little at a time, tasting as you go. You’re aiming for a broth that’s savory first, then gently sweet-sour.
7. Prepare the noodles. Cook rice vermicelli according to the package directions (often a quick boil or soak, then rinse). Drain well.
8. Assemble the bowls. Divide noodles into bowls. Ladle over hot broth, tomatoes, tofu, and riêu clusters.
9. Finish at the table. Top with a big handful of herbs and bean sprouts. Add extra lime, chili, black pepper, and fried shallots if you like.

🌿 Tips, swaps & common mistakes

• Don’t boil aggressively after adding the riêu. A hard boil can make the clusters dense and break them apart.
• Adjust sourness at the end. Vinegar/lime can turn flat if cooked too long. Add, taste, then add more only if needed.
• Crab options: If fresh crab isn’t available, pasteurized or canned crab still makes a very satisfying bowl. (Drain well, and check for shell pieces.)
• Make it pork-free: Skip the ground pork and use crab + egg only. You can also add more tofu for body.
• Herbs are not optional. The soup is designed to be “finished” with fresh greens—without them, it can taste heavier and less vibrant.

🧊 Storage & make-ahead

• Store broth and noodles separately. Noodles soak up liquid and go soft.
• Fridge: Broth keeps 2–3 days in a sealed container.
• Reheat gently: A soft simmer helps keep the riêu tender.

❓ FAQ

Is Bún Riêu always made with crab?

Crab is the classic star, but many home and street versions include pork, shrimp, tofu, or a mix—depending on region, budget, and availability.

Can I make it spicier?

Yes—add sliced fresh chili to the broth, or serve with chili on the side so everyone can adjust their bowl.

What if I can’t find rice vermicelli labeled “bún”?

Any thin rice vermicelli works. Cook it just until tender, then rinse briefly to stop it overcooking.

Our picks (for this recipe)

• Fish sauce (for depth and salt)
• Rice vermicelli (bún)
• Rice vinegar or limes (for the finishing tang)

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