Central Thai — the defining curry of Central Thai cuisine; the name 'keow wan' (sweet green) refers to the pale green colour of the immature chillies, not sweetness
Green curry paste is the most technically demanding of the Thai curry pastes — the fresh aromatics must be worked to an ultra-fine consistency or the paste will produce a stringy, separated curry rather than a smooth, fragrant one. The colour comes not from green chillies alone but from the combined green of fresh lemongrass, kaffir lime rind, galangal, krapao or horapha leaves, and the fresh green spur chillies (prik chee fah khiao) and bird's eye green chillies (prik kee noo khiao). The fresh aromatics must be pounded in the correct sequence — dried ingredients first, then progressively moister — or the wet materials will prevent the dry from breaking down. A properly made paste should be brilliant emerald green with a fine, almost smooth texture.
The quality of the green curry paste determines the quality of the curry more than any other factor — a properly made fresh paste produces a curry of completely different character from commercial paste, with a brightness and complexity that survives the long coconut milk cooking.
{"Pound in sequence: dried chillies and shrimp paste → galangal → lemongrass → kaffir lime rind → shallots → garlic → fresh chillies → fresh herbs","Each ingredient must be reduced to fine paste before adding the next — rushing produces chunky, uneven paste","Green chilli ratio: 60–70% fresh prik chee fah (colour), 30–40% prik kee noo (heat)","Do not use a blender for final finishing — it aerates the paste and turns it pale rather than deep emerald","Fresh paste keeps 1 week refrigerated; freeze in portions for up to 3 months"}
For maximum colour retention, chill the mortar and pestle before pounding and work quickly through the fresh herb stage. Some Thai cooks add a small amount of fresh spinach or Thai basil specifically for colour stability — this is a minor technique, not a traditional addition, but effective in high-volume cooking.
{"Using all bird's eye chillies — produces a paste with heat but no colour and insufficient flavour depth","Blending rather than pounding — produces aerated, pale, waterlogged paste that tastes raw","Skipping or under-using kaffir lime rind — loses the citrus-bitter dimension that defines the paste","Adding fresh chillies too early before aromatics are fully broken down — they will not pound to smooth in the remaining time"}