Gaeng Liang
แกงเลียง
Gaeng Liang is a light, vegetable-packed Thai soup-curry made with black pepper, shrimp paste, and lemongrass — often called the most nutritious dish in Thai cuisine.
Cultural Origin
Gaeng liang is one of the oldest Thai curries, predating the arrival of New World chilies, and is built on a paste of white pepper, shallot, shrimp paste and krachai (fingerroot). It is a clear, peppery, herbal vegetable soup with sweet leaves such as bai tamlueng, luffa and pumpkin, sometimes finished with shrimp or dried shrimp. It is a Central Thai household dish, traditionally given to nursing mothers for its galactagogue herbs.
Regional Variants
| Region | How it differs |
|---|---|
| Central | The canonical Central version uses a peppery shrimp-paste-and-krachai broth with luffa, pumpkin and bai tamlueng, finished with shrimp. |
| Southern | Southern gaeng liang is slightly hotter and sometimes uses additional southern vegetables and a more pungent shrimp paste. |
Allergens & Sensitivities
Key Ingredients
- zucchini
- sweet basil
- dried shrimp
- black peppercorns
- shallots
Taste profile
- Salty
- fish sauce, soy, shrimp paste
- Sweet
- palm sugar, coconut
- Sour
- lime, tamarind, fermentation
- Umami
- dried shrimp, fermented pastes, stock
Ground white pepper rather than chilli gives the heat, a sharper, more aromatic warmth than capsaicin; the broth is clear and thin, closer to a herbal soup than any other dish in this group.
How Gaeng Liang Is Made
- 1
Pounding an ancient, chilli-free paste
White peppercorns, shallot, shrimp paste and krachai (fingerroot) are pounded together — an old paste that predates the arrival of chilli in Thai cooking and still contains none.
- 2
Building a clear peppery broth
The paste is dissolved into water or a light stock and brought to a simmer, producing a clear, peppery liquid rather than a thickened sauce.
- 3
Adding shrimp for body
Fresh or dried shrimp goes into the broth early, contributing sweetness and body to what would otherwise be a very light liquid.
- 4
Adding a mix of vegetables
Luffa, pumpkin, sweet leaf (bai tamlueng) and sometimes baby corn are added and simmered just until tender, since the dish is meant to showcase a variety of vegetables rather than a single star ingredient.
- 5
Finishing without sugar or cream
Fish sauce seasons the broth, and Thai basil is stirred in at the very end for aroma, with no sugar added — gaeng liang is one of the few Thai curries with no sweetness at all.
When It’s Eaten
Traditionally served to nursing mothers and to anyone recovering from illness, valued for being light rather than for spectacle; a common counterpoint dish placed on the table alongside heavier fried or coconut-based dishes.
How to Order It
- ขอแกงเลียงหนึ่งที่
- kor gaeng liang neung thi
- One Gaeng Liang, please
- ใส่กุ้งสด
- sai goong sot
- With fresh shrimp
What people get wrong
Skipping it as just a soup when scanning a menu — gaeng liang is classed as a curry in Thai cuisine despite its clear, brothy appearance, and the pepper-forward heat can surprise diners who expect something bland.
Where to Try It
Central Thai restaurants; health-focused Thai eateries in Bangkok.
Tips
- Gaeng Liang is a great choice when you want something light after days of rich curries — the broth is clean and restorative.