Central Thai — considered one of the most ancient Thai preparations; associated with the royal court cuisine tradition
Gaeng liang paste is arguably the most unusual of the standard Thai curry pastes — it uses no coconut milk in its curry, is based on white pepper and shrimp paste rather than dried chillies, and is specifically designed to highlight a changing roster of seasonal vegetables and fresh herbs. The paste itself is simple: dried shrimp, white pepper, shallots, and kapi pounded together — the complexity comes from the specific vegetables added to the broth during cooking. It is considered one of the oldest Thai curry preparations, predating the chilli (which arrived from the Americas in the 16th century), and its flavour profile reflects pre-chilli Thai cooking.
Gaeng liang is the Thai curry for cooks and diners who want to understand where the cuisine comes from — its quiet, herb-forward, white-pepper warmth is a window into pre-Columbian Thai cooking.
{"No dried chillies: white pepper is the sole heat source","High dried shrimp content — this is a key ingredient that distinguishes liang from all other pastes","The paste must be fried briefly in oil before liquid is added — even without coconut fat, the base must be cooked","Vegetables added to the curry should be seasonal and include at least one leafy green, one gourd or marrow, and one aromatic herb","Do not boil vigorously once vegetables are added — the broth should simmer gently to preserve herb character"}
The choice of vegetables defines the dish: in summer, Thai marrow (buap) and young corn; in cooler months, sweet basil leaves, baby pumpkin, and pea eggplant. The paste itself requires fresh or very recently dried shrimp — old dried shrimp that has lost its sea scent will produce a flat, salty broth.
{"Adding chillies — this fundamentally changes the dish into something else","Substituting fish sauce for the dried shrimp — they are different ingredients serving different flavour roles","Using stock rather than water — the broth should be light and herbal, not rich","Over-cooking the vegetables — liang should feel like a fresh, herb-forward broth, not a stew"}