Kroeung is the Cambodian equivalent of Thai curry paste — a pounded spice paste that forms the foundation of most Cambodian cooking. Like its Thai cousin, it's built through deliberate pounding in a mortar. Unlike Thai paste, kroeung uses fresh turmeric as a primary ingredient, giving it a distinctive golden colour and earthy warmth. The basic kroeung includes lemongrass, galangal, fresh turmeric, garlic, shallots, and kaffir lime zest. Variations add chillies (kroeung for curry) or leave them out (kroeung for soups). It's the base of amok (Cambodia's national dish), samlor (soups), and most stir-fries.
Fresh turmeric is the distinctive ingredient — it provides colour, earthiness, and a warmth that dried turmeric cannot replicate. Lemongrass is the most generous ingredient — Cambodian pastes use more lemongrass relative to other aromatics than Thai pastes. The paste is pounded, not blended, though modern Cambodian kitchens increasingly use a food processor. For amok: kroeung is combined with coconut cream, egg, and fish sauce to create a custard-like steamed preparation — the paste flavours the coconut custard which sets around the fish during steaming.
For amok trey (fish amok): mix kroeung with thick coconut cream, egg, fish sauce, sugar, and sliced nhor leaf (if available — substitute with kaffir lime leaf). Pour over fish chunks in a banana leaf cup, steam 15-20 minutes until custard sets. The banana leaf cup isn't decoration — it imparts a subtle green flavour. Num Pang by Ratha Chaupoly covers Cambodian technique from a diaspora perspective, bridging traditional and modern approaches.
Substituting dried turmeric for fresh — fundamentally changes the flavour and colour. Using Thai curry paste as a substitute — the flavour profiles are related but distinct. Not pounding finely enough — the paste should be completely smooth. Over-using chilli — Cambodian food is generally less aggressively spicy than Thai. Steaming amok too long — the custard should be just set, still trembling.