Galangal-Braised Fish, Northern Style
Cá kho riềng
The north's austere kho — river fish braised over a bed of galangal with fish sauce and pepper, salt-forward where the southern claypot runs sweet.
By Vietnamese Cookbook Kitchen · April 18, 2026
Hải Phòng & the Northern CoastThe Lê Dynasty era, 1428–1789
Kho- Prep
- 20 min
- Cook
- 90 min
- Serves
- 4
- Level
- Intermediate
Kho is the ancient tense of Vietnamese cooking — fish braised down with salt and something dark until it keeps, a technique older than refrigeration and older than the written recipe. In the Red River delta, where galangal grows at the edge of every garden, the northern version paved the pot with it. The most famous expression is the cá kho of Vũ Đại village in Hà Nam, braised half a day in claypots and shipped around the country for Tết, but the same grammar — galangal bed, pork belly, patience, no coconut — runs through home kitchens from Hanoi to the Hải Phòng coast, wherever river fish meets a slow fire.
Set beside the sweet southern tộ, this is the flinty older sibling: less sugar, more pepper, and a braise long enough to soften the bones. The technique that matters most costs nothing — lay a solid floor of galangal coins and never turn the fish. The coins carry flavor up and keep the skin off the clay; stillness keeps the steaks whole. Serve it with rice and blanched greens on a cold evening, and note how the leftover galangal disappears before the fish does.
Buy more galangal than seems reasonable and slice half, pound half. The slices are armor for the bottom of the pot; the pounded half is the flavor, and a timid hand here produces a kho with an accent instead of a voice.
Lời đầu bếp · A word from the kitchen
Ingredientsnguyên liệu
Serves 4
Fish
- 700 gcarp or catfish steaks — about 1½ lb, cut through the bone, 3 cm thick; any firm river fish holds up
- 30 mlfish sauce — 2 tbsp, for the salt rub
- 1 tspcoarsely ground black pepper
Braise
- 100 gfresh galangal (riềng) — about 3½ oz — half in thick coins, half pounded or grated; frozen galangal from the Asian market works, dried does not
- 100 gpork belly — about 3½ oz, in thin slices — the northern trick for basting lean river fish from within the pot
- 30 mlnước màu (Vietnamese caramel sauce) — 2 tbsp, from the foundations jar — for color and edge, not sweetness
- 60 mlfish sauce — 4 tbsp
- 10 gsugar — 2 tsp only; this is the whole sweetness budget
- 300 mlwater — about 1¼ cups — no coconut water here; that is the other kho
- 2dried chilies — left whole
- 1 tbspextra black pepper — to finish — the north seasons this dish with pepper the way the south uses sugar
Methodcách làm
Step 1: Salt the fish early
Rub the steaks with fish sauce and pepper and rest them 20 minutes. Northern kho is seasoned deeply rather than sauced heavily, and the salt needs a head start into flesh this thick.
Step 2: Pave the pot with galangal
Lay the galangal coins in a solid layer across the bottom of the claypot, then the pork belly slices over them. The coins do two jobs — they perfume everything above and keep the fish skin off the clay, so the steaks come out whole after a long braise.
Step 3: Layer and season
Arrange the fish on the pork, scatter the pounded galangal and dried chilies over the top, and pour on the nước màu, fish sauce, sugar, and water. The liquid should sit just below the top of the fish; a kho drowned is a kho diluted.
Step 4: Braise long and low
Bring it to a simmer, then cook uncovered at the barest bubble for 75 to 90 minutes, tilting the pot to baste now and then. Do not turn the fish — the long braise softens even the pin bones, and turning is how steaks become flakes.
Step 5: Reduce and rest
When the liquid is down to a few dark spoonfuls, raise the heat a minute to glaze, kill the flame, and grind the finishing pepper over the top. Rest ten minutes; like every kho, it is better still an hour later, and better again tomorrow.
Đồ nghề · The tools
Equipment
Claypot
Thố đấtThe vessel kho was invented in — clay heats slowly, holds a caramel simmer without scorching, and goes straight to the table still bubbling. Season it once with rice water and it outlives you.
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.
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Questions from the kitchen
How is this different from the cá kho tộ already on this site?
Same verb, different temperament. The southern tộ is caramel-sweet and quick — coconut water, a generous hand with nước màu, 45 minutes. The northern riềng version is longer, leaner, and salt-and-pepper-forward, with galangal doing the aromatic work coconut does down south and barely enough sugar to round the fish sauce. Cook both and you have tasted the two poles of the country's oldest braise.
Can I substitute ginger for the galangal?
No — and this is the rare substitution question with a flat answer. Ginger is hot and floral; galangal is piney, citrusy, and almost medicinal, and it is the entire identity of the dish. Frozen galangal root is in nearly every Southeast Asian market and grates from frozen. If you truly can't find it, make the southern cá kho tộ instead.
Why line the pot instead of just adding galangal to the liquid?
The bed does what a rack does in an oven. Fish skin that spends 90 minutes against hot clay welds to it; galangal coins hold the steaks clear, surrender their flavor upward, and — the cook's reward — turn into candied, fish-sauce-soaked coins that some northerners prize over the fish itself.
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