Cao Lầu
Cao lầu
Hội An's trading-port noodle — chewy lye-water noodles, five-spice pork, crisp croutons, and a few spoonfuls of broth, from a town that kept its secrets.
By Vietnamese Cookbook Kitchen · June 9, 2026
Quảng Nam & Đà NẵngThe Lê Dynasty era, 1428–1789
- Prep
- 30 min
- Cook
- 60 min
- Serves
- 4
- Level
- Intermediate
From the sixteenth century, Hội An — Faifo, to the European captains — was one of Southeast Asia's busiest ports, where the Nguyễn lords let Japanese and Chinese merchants settle in their own quarters along the Thu Bồn river. The Japanese built the covered bridge that still stands; after Japan sealed itself off in the 1630s their quarter faded, but the Chinese congregations stayed, and their assembly halls anchor the old town to this day. Cao lầu is that history in a bowl: pork marinated like char siu, noodles whose firm, tan chew invites the udon comparison — a Japanese link often suggested, never proven — and a name usually glossed as "high floor," for the upstairs rooms where merchants ate watching their cargo.
Everything here argues for restraint. The pork's braising liquid, reduced to a glossy handful of spoonfuls, is all the broth the dish wants, and the noodle's chew is the entire argument — blanch it past thirty seconds and you have cooked away the reason Hội An guards its recipe. When the river silted up in the nineteenth century, the trade sailed on to Đà Nẵng and left the town — and this dish — perfectly preserved. UNESCO certified the buildings in 1999. The noodles never needed the paperwork.
Slice the pork only after it has rested ten minutes in its liquid — cut hot, it crumbles; cut rested, you get those clean bronze-edged coins. The liquid you rest it in is the broth, so nothing waits idle.
Lời đầu bếp · A word from the kitchen
Ingredientsnguyên liệu
Serves 4
The pork (xá xíu-style)
- 600 gpork loin or shoulder — about 1⅓ lb, in one piece — loin slices prettier, shoulder eats better
- 3garlic cloves, minced
- 2 tbspsoy sauce — 30 ml
- 1 tbspfish sauce (nước mắm) — 15 ml
- 1 tbspsugar
- 1 tspfive-spice powder
- 1 tspsweet paprika or annatto powder — for the lacquered red edge — color, not heat
- 300 mlwater — about 1¼ cups; it becomes the braising liquid, which becomes the broth
Noodles and assembly
- 600 gfresh thick rice noodles — about 1⅓ lb — the closest thing to true cao lầu noodles you can get abroad; see the FAQ before you despair
- 80 gcrisp croutons — squares of fresh noodle sheet or wonton wrappers, fried golden — about 2 cups, loosely
- 2 handfulsbean sprouts
- 2 handfulsmixed greens and herbs — watercress or lettuce, mint, cilantro — in Hội An these come from the garden village of Trà Quế
- 1lime, in wedges, plus sliced fresh chili
- 2 tbspneutral oil, for frying
Methodcách làm
Step 1: Marinate the pork
Rub the pork all over with the garlic, soy, fish sauce, sugar, five-spice, and paprika, and let it sit at least 30 minutes — overnight is better. This is a Chinese char siu grammar spoken with a Vietnamese accent, and the marinade is doing double duty: it will season the broth too.
Step 2: Sear, then braise
Brown the pork on all sides in a little oil over medium-high heat — the sugar will darken fast, so keep it moving. Pour in the water, scrape the pan, cover, and simmer gently for 40 minutes, turning once, until the liquid has reduced to a glossy few hundred milliliters. That liquid is the entire broth of this dish; guard it.
Step 3: Fry the croutons
While the pork braises, fry the noodle or wonton squares in 1 cm of hot oil until puffed and golden, about a minute, and drain them on paper. They stale quickly and soften quicker, so fry them the day you eat.
Step 4: Blanch and drain hard
Dip the bean sprouts in boiling water for 20 seconds, then warm the noodles in the same pot for 30 — no longer, since chew is the entire point of this noodle. Drain both until they are truly dry.
Step 5: Assemble with restraint
Sprouts in the bowl first, noodles on top, then the pork sliced into coins. Spoon over three or four tablespoons of the braising liquid per bowl — no more. Finish with greens, a fistful of croutons, chili, and lime, and toss before eating.
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 →Charcoal grill / grill pan
Vỉ nướngNướng means fire, and lemongrass pork wants char and smoke. A small charcoal grill is the true answer; a screaming-hot cast-iron grill pan under a cracked window is the honest apartment one.
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 →
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 noodles should I use outside Hội An?
Fresh thick rice noodles from an Asian market, the udon-gauge kind, are the best honest stand-in; dried udon itself works and gets the chew right, though the flavor runs wheatier than the original. Nothing will be exactly it — even elsewhere in Vietnam, cao lầu noodles are shipped from Hội An or done without.
Is the story about the well water true?
It is a legend, and Hội An tells it with a straight face: true cao lầu noodles are said to require water from the ancient Bà Lễ well and lye made from the ash of trees on the Chàm Islands offshore. What is verifiably true is the technique the story encodes — an alkaline lye-water dough, which is what gives the noodles their tan color and their defiant chew.
How is this different from mì Quảng?
They are neighbors, not siblings. Mì Quảng is soft turmeric rice noodles under a scant shrimp-and-pork broth and belongs to the whole province; cao lầu is a firm alkaline noodle with Chinese-style pork and fried croutons, and belongs to one town. Order both in Hội An and taste the difference a port makes.
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