Central Thai — though red curry pastes in varying forms appear throughout Thai cuisine, the Central Thai version is the benchmark
Red curry paste (phrik gaeng phet) is the most versatile and widely used Thai paste — the foundation of gaeng phet, chu chi, and many regional variations. Unlike green paste, it uses dried red chillies (rehydrated) as the primary heat and colour source, producing a paste that is stable, richer in colour, and with a deeper, slower-releasing heat profile. The dried prik haeng (dried spur chillies) are soaked in warm water for 15 minutes, then squeezed dry before pounding — this removes excess water while retaining flavour compounds. The addition of coriander seed and cumin distinguishes this paste from green curry paste and gives it its characteristic warm earthiness.
Red curry paste is the flavour signature of hundreds of Thai dishes — its dried chilli warmth, coriander earthiness, and kapi depth is the aromatic through-line of Central Thai curry culture.
{"Soak dried red chillies in warm water 15 minutes, squeeze out excess moisture before adding to mortar","Toast coriander seed and cumin lightly before adding — these are the key spices absent from green paste","The kapi component is larger in red paste than green — the dried chillies can absorb more fermented depth","A properly finished paste should feel almost completely smooth — no visible chilli skin fragments","Ratio dried large chilli to dried bird's eye: 3:1 — predominantly for colour, with bird's eye for heat"}
For paste that will be stored or sold commercially, reduce the fresh ingredients (lemongrass, galangal, shallots) by 10–15% compared to home-use paste — the fresh components contribute moisture that degrades storage life. For immediate use, more is more.
{"Under-soaking dried chillies — they won't break down in the mortar and leave skin fragments","Not squeezing excess water from soaked chillies — dilutes the paste and extends cooking time for fat to release","Skipping coriander seed and cumin — produces a paste closer to green curry in character, losing the warmth","Over-roasting the cumin — scorched cumin is bitter and dominates all other flavours"}