Red curry paste is the foundation paste of central Thai cooking — Thompson describes it as the closest to a 'standard' Thai curry paste, the preparation from which many other pastes are derived. The dried red chilli's role in the paste reflects both the history of the chilli in Thai cuisine (introduced from the New World via Portuguese traders in the 16th century, adopted with such completeness into Thai cooking that its origin is rarely remembered) and the central Thai kitchen's preference for the deeper, rounder flavour of dried chilli over the vivid freshness of green.
A curry of central Thailand built on a paste of dried red chillies that gives the preparation its name and its characteristic deep red-orange colour — richer and somewhat more intense in flavour than the fresh-chilli brightness of green curry, with the dried chillies contributing a fruity depth and a warmth that builds rather than strikes. Red curry is the most versatile of the classical Thai curries: it can take almost any protein (duck, beef, pork, seafood, tofu), any vegetable of compatible texture, and it scales from modest heat to considerable intensity depending on the quantity and variety of dried chilli used.
**Red curry paste (prik gaeng daeng):** - Dried long red chillies (phrik haeng): soaked, seeds retained for full heat or reduced for moderate. The dried chilli's deep red colour is the visual signature of the paste. - Dried bird's eye chillies (phrik khi nu haeng): smaller quantity — add heat without altering the colour significantly. - All other aromatics as per Entry T-02 (lemongrass, galangal, kaffir lime zest, coriander root, garlic, shallot, shrimp paste). - No fresh coriander leaf — the fresh herb is not in the red curry paste. The colour comes from the dried chilli. - Cumin and coriander seed: dry-toasted, ground — both essential to red curry paste in a proportion not used in green curry. **The preparation:** Identical to Entry T-04 (crack coconut cream, fry paste, add protein, add liquid, balance) with two distinctions: 1. The paste cooks longer in the cracked cream — dried chilli paste needs 4–5 minutes of frying before all raw notes have developed. Fresh chilli paste (green) needs slightly less. 2. The balance adjustment: red curry typically requires more palm sugar to balance the dried chilli's slight bitterness than green curry requires. Thompson notes that a correctly balanced red curry should have a perceptible sweetness that is not present in the same proportion in green curry. Decisive moment: The paste frying time — specifically, the smell of the dried chilli in the cracked coconut cream. At 2 minutes: still slightly raw, with a sharp dried-chilli note. At 4 minutes: the dried chilli's aromatic compounds have developed fully in the hot oil — the smell is deep, slightly fruity, complex, and rounded. At 5 minutes, the paste for a beef or duck red curry (which will cook for much longer in the finished dish) is at a stage where further development will occur during the main cook. For a quick protein (prawns), fry the paste for the full 5 minutes.
David Thompson, *Thai Food* (2002); *Thai Street Food* (2010)