A pungent Isaan and Lao bamboo-shoot salad in which boiled shoots are shredded fine, pounded, and dressed with the green juice of yanang leaves, toasted rice powder, fermented fish, chili and herbs. Despite the English name, it is not a soup but a thick, barely-wet pounded salad eaten with sticky rice. The yanang juice gives an earthy, faintly bitter green backbone, the toasted rice a nutty body, and the fermented fish a deep funk. It is sour, savoury and unmistakably northeastern.
Soup nor mai is a staple of the Lao-Isaan kitchen on both sides of the Mekong, where bamboo grows wild and shoots are a free seasonal food in the rainy months. Its defining partner is bai yanang (Tiliacora triandra), a forest vine whose hand-rubbed leaf juice is the regional signature for bamboo dishes. Here 'soup' renders a Lao word for a pounded-and-tossed salad rather than a broth, which is why the dish is dry. It is old folk food with no fixed date, born of cooks turning a cheap, slightly tricky wild vegetable into a vivid, well-seasoned dish.
Fine bamboo threads, tender but with a slight crunch, coated in a dark, clinging dressing rather than soaked in liquid. The yanang juice reads earthy and grassy with a whisper of bitterness; toasted rice powder thickens and softens it with nutty grit; fermented fish drives a salty, funky depth, and lime and chili cut back through with sour heat. Herbs and spring onion lift the top. It is bold, a little wild-tasting, and built to be eaten in small bites with plenty of sticky rice.
Two things make this dish work, both about handling bamboo safely and deliciously. Raw bamboo shoots contain taxiphyllin, a cyanogenic glycoside that releases hydrogen cyanide; thorough boiling (and discarding the water) volatilises and breaks it down, which is why the shoots are always cooked first and never used raw. The yanang juice — squeezed by rubbing the leaves in water until they bleed green — is the regional partner used to season and, by the cuisine's own logic, to help temper the shoots through cooking; it also contributes its earthy colour and tannic backbone. Pounding the boiled shoots frays the fibres so they take up the dressing, while toasted glutinous rice ground coarse thickens the loose liquid into a clinging sauce and adds smoky aroma, and the fermented fish supplies the glutamate umami that defines the seasoning.
Variations
It shades into kaeng nor mai, the looser yanang-and-bamboo soup, when more liquid is left in; the dry pounded version here is the salad form. Cooks vary the funk by the amount and kind of fermented fish, and some add cha-om, mushrooms or pumpkin leaf. Lao kitchens make the near-identical dish under their own name. The non-negotiables are properly boiled shoots, yanang juice, toasted rice powder and fermented fish.
On the Palate
Where Soup Nor Mai sits in the Thai flavor cloud
Ingredients
Serves 4
How it's made
6 steps · 40 min
- 115 min
Boil the shredded bamboo shoots thoroughly in plenty of water, then drain and discard the water.
Watch outBoil the shredded bamboo thoroughly and throw the water away — that discard step is what makes raw shoot safe to eat; never skip it.
- 26 min
Make yanang juice by rubbing the leaves in water until the liquid turns deep green, then strain.
- 36 min
Toast glutinous rice in a dry pan until deep golden and pound to a coarse powder.
Watch outToast the glutinous rice in a dry pan to deep golden before pounding — the nutty roast is the dish's backbone; pale rice tastes of nothing.
- 48 min
Simmer the bamboo briefly in the yanang juice with fermented fish to season and thicken.
- 53 min
Pound or toss the shoots with chili, lime, toasted rice powder, shallot and herbs.
- 62 min
Adjust for sour-salt-funk balance and serve warm or at room temperature with sticky rice.
