The Lao version of khao soi: rice noodles in a mild tomato and pork broth topped with crispy fried noodles — simpler and earthier than the Thai-Chiang Mai version.
Khao soi exists in distinct forms across mainland Southeast Asia, and the Lao version — the original — is notably different from the now-globally famous Thai-Chiang Mai iteration. In Laos, khao soi is a tomato-based noodle soup with pork and dried chilies, without coconut milk, and traditionally served with flat rice noodles rather than egg noodles. It is the version found in Luang Prabang's morning markets and roadside restaurants, representing an older, earthier tradition. This recipe presents the Lao khao soi: a clear, fragrant broth with slow-cooked pork, fermented soybeans (tua nao), and dried chilies, topped with crispy fried rice noodles for textural contrast. The Lao version demonstrates how a dish can carry the same name across borders while representing entirely different culinary philosophies — this is broth as clarity and restraint, not richness.
Serves 4
Char shallots, garlic, and tomatoes directly over a flame or under a broiler until blistered. This adds smokiness to the broth.
Place pork with water in a pot. Add charred shallots, garlic, tomatoes, dried chilies, and tua nao paste. Bring to a boil, skim foam, then simmer 40 minutes until pork is tender.
Charring the aromatics before adding them is the technique that gives Lao khao soi its distinctive smoky depth.
Add fish sauce and palm sugar. Strain broth if you prefer a clear soup, or leave with soft tomato pieces for a heartier texture.
Heat oil to 180°C. Fry a small bundle of dried rice noodles for 15-20 seconds until puffed and crispy. Drain. These become the crunchy topping.
Cook flat rice noodles per packet until just tender. Drain and divide among bowls.
Ladle hot broth with pork over the noodles. Top with crispy fried noodles, cilantro, scallions, and bean sprouts. Serve with lime and chili flakes.
Charring the aromatics before adding to the broth is the technique that distinguishes Lao khao soi from simple pork noodle soup.
Tua nao (fermented soybean disc) is available at Lao and Thai grocery stores — miso is a workable substitute.
Fry the crispy noodles immediately before serving; they lose crunch within minutes of contact with broth.
Thai-Chiang Mai khao soi: coconut milk broth with egg noodles, curry paste, and crispy noodle topping — a related but distinct dish.
Chicken khao soi: use bone-in chicken thighs instead of pork for a lighter broth.
Store broth and noodles separately. Broth keeps refrigerated 3 days. Crispy noodles must be fried fresh each time.
The original khao soi is believed to be a Yunnanese-influenced noodle dish from the highland Shan State region that traveled south with Yunnanese Muslim (Chin Ho) traders along the ancient caravan routes through Burma and Laos from the 19th century. The tomato-based Lao version predates the coconut-milk Thai-Chiang Mai adaptation and represents the dish before it was enriched with coconut milk to suit northern Thai taste preferences.
Lao khao soi is a tomato-based pork broth with flat rice noodles — clear, smoky, and earthy. Thai-Chiang Mai khao soi is a coconut milk curry broth with egg noodles. They share a name and crispy noodle topping but are otherwise different dishes.
Tua nao is Lao fermented soybean paste, made from soybeans inoculated with koji and dried into discs. It adds deep umami to broths and sauces. Miso paste is the most accessible substitute in Western grocery stores.
You can, but the broth will taste flat and generic — the charring step is what makes it distinctively Lao. Even 5 minutes under a broiler dramatically improves the flavor.
Per serving (460g / 16.2 oz) · 4 servings total
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