Larb is Isaan and Lao in origin — the ceremonial and celebratory minced meat preparation of the northeastern provinces and their cultural extension into Laos. Thompson treats both the Thai-style larb (with toasted rice powder — khao khua as the defining ingredient) and the Chiang Mai northern Thai version (lap, with a complex dry spice paste similar to a dry curry paste).
A preparation of very finely minced (or chopped to a near-paste) chicken, rapidly cooked, dressed while still warm with fish sauce, lime juice, toasted rice powder (khao khua), dried chilli flakes, shallots, mint, and coriander. Larb is the quintessential preparation of northeastern Thailand (Isaan) and Laos — it is not a salad in the Western sense (cool, dressed greens) but a warm minced meat salad of intense flavour where the toasted rice powder's nutty crunch and the mint's sharp freshness are as important as the protein itself. The preparation belongs to the yam category (tossed salads dressed with fish sauce, lime, chilli) but its warm temperature and the toasted rice powder place it in a distinct sub-category.
Toasted rice powder's flavour contribution to larb is the combination of Maillard products from the toasting (pyrazines, furans — the same compounds as in toasted coffee and bread crust) and the starchy texture that provides a slightly coarse, nutty coating to the dressed chicken. As Segnit notes, mint and chilli is one of the most physiologically interesting flavour pairings: menthol (mint's primary compound) activates the same TRPM8 cold receptors that are used by genuine cold temperature — producing a cooling sensation on the palate at the same moment the chilli's capsaicin activates the TRPV1 heat receptors. The sensation of larb — simultaneously hot and cool, simultaneously fresh and complex — is a deliberate physiological experience produced by the combination of these two compounds.
**Toasted rice powder (khao khua) — the defining ingredient:** The preparation that distinguishes larb from all other Thai meat salads. Raw sticky rice (khao niew) — not regular rice — toasted dry in a pan over medium heat, stirring constantly, until the grains are deep gold and smell of popcorn and toasted grain. Ground while still warm in a spice grinder or mortar to a slightly coarse powder (not flour — the texture should be fine-sandy, not powdery). Added to the larb at the point of dressing — its nutty depth and slight coarseness are the textural and flavour element that give larb its character. **The toasting end-point:** Medium gold = raw grain note still detectable, insufficient toasting. Deep gold = fully toasted, nutty, complex. Brown = beginning to burn, bitter. The end-point is deep gold with a nutty, popcorn smell. This takes 15–20 minutes over medium heat with constant stirring — patience is required. **Ingredient precision:** - Chicken: thigh and breast combined, minced very finely — a food processor is acceptable here (unlike curry paste, the goal is fine mince rather than fibrous integration). The combination of thigh (fat, flavour) and breast (lean, texture) is better than either alone. - Fresh chillies: for finishing — not cooking. - Dried chilli flakes: for heat within the salad, not the sharp fresh heat of uncooked chilli. - Shallots: thinly sliced, raw. - Mint: generous — the cooling counterpoint to the chilli's heat. - Coriander: leaves and fine stem. - Spring onion (hom daeng): sliced thin. 1. Cook the finely minced chicken in a dry pan or with a small amount of water — the chicken should cook in its own fat and moisture, not be browned. The texture should be loosely separated rather than clumped. A small amount of stock or water keeps it moist. 2. Remove from heat while still just cooked — the residual heat will continue cooking. It must not be overcooked. 3. While still warm: add the toasted rice powder, dried chilli flakes, fish sauce, lime juice, shallots, fresh chilli. 4. Toss and taste. Adjust across all four registers (Entry TH-02). 5. At service: add the mint and coriander. Toss once. Decisive moment: Dressing the warm minced chicken immediately while it is still just-cooked and warm — not hot, not cold. The toasted rice powder, fish sauce, and lime juice penetrate the warm chicken and marry with its residual heat. If the chicken is cold when dressed, the rice powder remains distinct and grainy rather than integrating. If it is too hot, the lime juice cooks further and the fresh herbs wilt on contact. Sensory tests: **Smell — the toasted rice powder:** Freshly toasted and ground khao khua smells of popcorn, toasted grain, and a slight nutty caramel note. It should smell complex and fully developed — not raw and starchy (under-toasted) and not sharp-smoky (over-toasted). **Taste — the warm larb:** The first taste should register: the fish sauce and lime as the primary sour-salty pairing, with the toasted rice powder's nuttiness arriving as a mid-palate texture-and-flavour event, the dried chilli heat building, and the mint's menthol cutting through all of these registers as a cooling brightness at the finish. All five elements should be simultaneously perceptible in each mouthful. **Sight — the dressed larb:** The chicken should be separated into fine pieces, not clumped. The rice powder coats the surface of the chicken grains. The herbs are scattered throughout, still fresh in colour. The raw shallot provides a white-purple visual note.
- Make the toasted rice powder in large batches — it keeps at room temperature in an airtight container for 2 weeks and is used as a condiment and garnish in multiple Isaan preparations - The same technique applies to pork (larb mu), beef (larb nua), duck (larb ped), and mushroom (larb hed) — the protein changes; the technique, rice powder, and herb garnish remain constant - Larb is eaten with sticky rice pressed into small balls by hand — the neutral, adhesive quality of glutinous rice makes it the appropriate foil for larb's intense, herb-forward flavour
— **Grainy, separate toasted rice powder that doesn't integrate:** The chicken was cold or fully cooled when the powder was added. Dress warm. — **Flat, one-dimensional with no textural interest:** Khao khua not made from sticky rice — regular long-grain rice does not produce the same toasted depth when toasted and ground. The starch structure of sticky rice produces a different aromatic profile when heated. — **Mint wilted and unperceptible:** Mint added too early, when the chicken was still too hot. The mint should be added at the very last moment before service — never before.
David Thompson, *Thai Food* (2002); *Thai Street Food* (2010)