Prahok — Cambodian fermented fish paste made from mud fish (snakehead, featherback) salted and fermented for months — is the defining flavour ingredient of Cambodian cooking, functioning identically to Thai shrimp paste, Vietnamese mắm tôm, and Lao pla ra — as an extreme concentration of umami and funk that flavours almost every preparation in its tradition. Its smell is among the most pungent of any food ingredient; its flavour in small amounts transforms and deepens any preparation.
- **Production:** Freshwater fish (typically from the Tonle Sap lake system — the world's largest inland fishery during flood season) cleaned, salted, and layered in jars, pressed under weights and fermented for 3–12 months. - **The flavour:** Extremely salty, deeply fermented, intensely umami — virtually every amino acid from the fish's protein is present in free form. Used in small quantities only. - **Raw vs cooked applications:** Raw prahok in dipping sauces (prahok ktis — with coconut milk and minced pork); cooked prahok fried in oil to tame the extreme raw ferment before addition to soups and stir-fries. - **The cooking transform:** Frying prahok in oil for 2–3 minutes dramatically reduces the raw pungency while preserving the umami depth — the heat denatures the most volatile compounds.
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