Kaeng pa is the most ancient of the Thai curry forms — the paste-and-water braise that predates the influence of coconut and trade-route spices in the Thai kitchen. Thompson treats it as the baseline technique from which all the richer curries can be understood: if you understand kaeng pa, you understand what coconut milk does to a curry when it is added.
A curry with no coconut milk — a thin, fiery, broth-style curry made with a paste of dried chillies, galangal, lemongrass, kaffir lime zest, and shrimp paste, cooked in water or stock with whatever proteins and vegetables are available. Jungle curry (kaeng pa — forest curry) is the curry of the interior, where coconut palms do not grow — a preparation that demonstrates the Thai curry tradition's full range: from the rich, sweet coconut-milk curries of the coast and central plains to the sharp, intensely hot, broth-based curries of the mountain forest region. The absence of coconut milk is not a deficiency but a different philosophy: the paste's aromatic oils distribute directly through the broth, creating an entirely different flavour delivery than the fat-mediated aromatics of coconut milk curries.
**The paste — leaner than standard red curry:** - Higher proportion of dried chillies (kaeng pa is very hot). - Krachai (Chinese keys / fingerroot): an aromatic rhizome with a distinctive camphor-fresh note, added to the paste for jungle curry specifically. It grows wild in the forest regions where jungle curry is made. - Galangal and lemongrass in the standard ratio. - Shrimp paste. - No shallots and garlic in the quantities of a coconut curry paste — the broth dilutes the paste rather than the fat-rich coconut cream concentrating it. - No dried spices (no cumin, coriander — these require the fat of coconut milk for their fat-soluble aromatic compounds to distribute). **The preparation:** 1. No cracking. Bring water or light stock to a boil. 2. Add the jungle curry paste directly to the boiling liquid. Stir to dissolve. 3. Add protein (traditionally wild boar, frogs, or whatever is available from the forest; substitute with pork, chicken, or fish). 4. Add vegetables: bamboo shoots, pea eggplants, long beans, young green peppercorns on the stalk. 5. Season with fish sauce. Kaeng pa does not use palm sugar — the absence of sweetness is part of the preparation's character. 6. Simmer for 10–15 minutes. **The young green peppercorns:** A characteristic garnish and ingredient — the fresh peppercorn stalks provide a sharp, fresh pepper heat entirely different from dried black pepper. They are added in the last 5 minutes and eaten off the stalk — each individual peppercorn providing a small, intense burst of fresh peppercorn heat. Decisive moment: The heat calibration — kaeng pa is expected to be genuinely, assertively hot. The dried chilli quantity in the paste is substantially higher than in other Thai curry pastes. There is no coconut milk to moderate the heat. If it is not hot enough to produce a sustained warmth throughout the eating: more chilli is needed. Kaeng pa's heat should be present from the first spoonful and sustained throughout. Sensory tests: **Sight:** The broth of kaeng pa is clear or slightly cloudy from the dissolved paste — not the opaque cream of a coconut milk curry. Its colour: a deep orange-red from the dried chilli, with the yellow-green of the vegetables distributed through the clear broth. **Taste:** Immediately hot, sharply savoury from the fish sauce and shrimp paste, aromatic from the lemongrass and galangal with no fat-smoothing — their aromatic oils are distributed directly in the broth rather than carried in the fat of coconut cream, making them more volatile and immediate. The absence of sweetness (no palm sugar) makes the heat and sourness more direct.
David Thompson, *Thai Food* (2002); *Thai Street Food* (2010)