Bún Riêu Cua
Bún riêu cua
Northern rice noodles in a paddy-crab and tomato broth, the riêu curds lifted whole from the pot — with an honest jarred-paste route for kitchens abroad.
By Vietnamese Cookbook Kitchen · March 20, 2026
Hà Nội & the Red River DeltaThe Lê Dynasty era, 1428–1789
Phở- Prep
- 40 min
- Cook
- 50 min
- Serves
- 4
- Level
- Intermediate
Bún riêu belongs to the wet-rice world of the Red River Delta, where the same paddies that grew the noodle also grew the protein: cua đồng, small freshwater crabs pulled from the mud, pounded shell and all, and strained into a liquor that sets into curds when heated. It is old peasant engineering — a dish built from what the field gave away free — refined over centuries into one of Hanoi's defining bowls. The tomatoes are the newer arrivals, folded in and made so central that the broth is now unimaginable without their sweet-sour lift and lacquer-red color.
Everything in the pot serves the riêu, the rust-colored rafts of crab curd that float up as the broth sets them. The curds form in still liquid — once the crab goes in, stop stirring. Abroad, the jarred crab paste and a tin of good crab meat get you remarkably close, and no cook in Hanoi will fault the substitution, though a few will tell you, at length, about their grandmother's mortar. Believe them, and make the bowl anyway.
The curds are the dish. Once the crab mixture goes into the pot, take your spoon out of the broth and keep it out — every stir costs you a raft.
Lời đầu bếp · A word from the kitchen
Ingredientsnguyên liệu
Serves 4
The riêu
- 1 jar (160 g)minced crab in spices (gia vị nấu bún riêu) — the standard route abroad — Por Kwan is the shelf staple; in Vietnam this would be a kilo of live paddy crabs, pounded and strained
- 200 gcanned or pasteurized crab meat — 7 oz — lump or claw; this restores the body the jar alone can't give
- 3eggs
- 40 gdried shrimp — about 1/2 cup, soaked 15 minutes and ground fine
Broth
- 1.5 Lpork or chicken stock — 6 cups — light and unsalted; water works, the bowl just gets quieter
- 5ripe tomatoes — about 600 g / 1.3 lb, cut in sixths
- 3shallots — sliced fine
- 2 tbsptamarind pulp — soaked in 60 ml hot water and strained; the broth's sour spine
- 1 tbspmắm tôm (fermented shrimp paste) — the non-negotiable funk of a true bún riêu; see the FAQ before omitting
- 30 mlfish sauce — 2 tbsp, plus more to season
- 1 tbspannatto seeds in 2 tbsp oil — warmed and strained for the red sheen; sweet paprika in oil at a pinch
To serve
- 400 gthin rice vermicelli (bún) — 14 oz dried
- 300 gfirm tofu — 10 oz, cubed and fried golden
- 1 plateherbs and rau muống splits — perilla, mint, bean sprouts, shredded banana blossom if you can get it
- 4lime wedges
Methodcách làm
Step 1: Make the crab base
Stir together the jarred crab paste, crab meat, ground dried shrimp, and eggs until just combined. This mixture is about to become the riêu — the soft curd rafts the dish is named for — so keep it loose and don't beat it smooth.
Step 2: Build the broth
Sweat the shallots in a spoon of oil in your soup pot, add half the tomatoes, and cook until they slump. Pour in the stock with the tamarind water, fish sauce, and mắm tôm, and bring to a gentle simmer — the funk of the shrimp paste will round out and settle as it cooks.
Step 3: Set the curds
Lower the heat until the broth barely moves, then pour the crab mixture over the surface in a slow stream. Do not stir. In four or five minutes it will set into rust-colored rafts and float; poking at it before then turns the pot into murk.
Step 4: Finish the pot
Slide in the remaining tomatoes and the fried tofu, and let them warm through for five minutes — the late tomatoes keep their shape and their brightness. Lace the annatto oil over the top for the lacquer-red sheen the bowl is known by.
Step 5: Assemble
Cook the bún, mound it in bowls, and ladle broth around it, lifting the riêu rafts on last so they arrive whole. Herbs and lime at the table, in quantity — this bowl expects a small garden stirred through it.
Đồ nghề · The tools
Equipment
Tall stockpot (12 qt+)
Nồi hầmPhở is a marathon of bones and water, and a wide pot evaporates your broth away. Go tall and narrow — the depth keeps a lazy simmer lazy for six hours.
Shop on Amazon →Portable gas burner
Bếp ga miniLẩu is not lẩu if someone has to keep walking to the stove. The tabletop butane burner turns a pot of broth into a two-hour dinner party.
Shop on Amazon →Fine-mesh skimmer
Vợt vớt bọtClear phở broth is not a trick, it is patience with a skimmer — take the scum off early and often and the pot rewards you with glass.
Shop on Amazon →Mortar & pestle
Cối chàyLemongrass, garlic, and chilies pounded release oils a blender never finds — it bruises where blades slice. The sound of a Vietnamese kitchen starting dinner.
Shop on Amazon →
Equipment links are Amazon affiliate links. As an Amazon Associate we earn from qualifying purchases, at no cost to you. Disclosure.
Questions from the kitchen
What is this supposed to taste like if I've never had it?
Sweet-sour tomato up front, then the low tide of crab and fermented shrimp underneath — brighter than phở, rowdier than bún thang. It is Hanoi's summer bowl, eaten when the paddies gave crabs and the gardens gave tomatoes.
Can I skip the mắm tôm?
You can substitute an extra spoon of fish sauce and the bowl will still be good — but it will be bún riêu with its bass turned off. One honest note: mắm tôm is a fermented raw-shellfish product, so if you are pregnant, simmer it fully in the broth as this recipe does rather than adding it raw at the table, or leave it out.
What are paddy crabs, and is the jar really acceptable?
Cua đồng are small freshwater crabs that live in the rice fields of the Red River Delta — pounded whole and strained, they make the original riêu. Abroad, the jarred spice-crab paste plus real crab meat is the accepted route in Vietnamese kitchens too, not a tourist shortcut. Fresh curds are better; the jar is honest.
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