Galangal — flavouring profile

Galangal is ginger's sharper, piney cousin — camphor, citrus and a peppery bite where ginger is warm and sweet — and because it anchors the lime-and-coconut world of tom kha and tom yum, it asks for a high-acid, aromatic white that can mirror its terpenes and ride the sourness.

The compounds that matter. Galangal (Alpinia galanga) is built on terpenes — cineole (eucalyptol), the cooling, faintly camphoraceous note; pinene, the resinous pine edge; and a clutch of citrus and floral terpenes that lift the rhizome above ginger's warmth. There is a peppery sharpness too, milder than chilli but enough to register. These terpenes find their match in aromatic, terpene-rich wines, where pine, citrus and a cool herbal note meet galangal on the same ground. The catch is balance: galangal almost never appears alone but in the company of lime, lemongrass, fish sauce and often chilli, so the wine needs the high acid those sour-savoury dishes demand, and a little sweetness wherever chilli enters.

What it demands of a wine. High acid, to match the lime and the sour-spicy broth it lives in. Aromatic, terpene-rich character to mirror the pine, citrus and cooling notes — but in proportion, since an over-perfumed wine buries a subtle dish. Modest alcohol and no oak: vanilla and toast fight the fresh, resinous edge, and high alcohol would inflame the pepper and any chilli. A touch of residual sugar earns its place the moment chilli heat appears.

Seek. Aromatic, high-acid whites with citrus and herbal lift. A floral-terpene white mirrors the rhizome's perfume directly, while a peppery, green-herbal style meets its pine-and-pepper edge. Where the dish turns sour and spicy, as in tom yum, an off-dry aromatic white holds the acid and softens the chilli at once. A lime-precise, anise-tinged white bridges the lemongrass and lime of tom kha cleanly.

Avoid. Oaked, full-bodied wines — vanilla and weight smother the fresh terpenes. Low-acid aromatic whites such as Gewürztraminer, which both overwhelm the dish with their own perfume and fall flat against the lime and chilli. Tannic or high-alcohol reds, which clash with the sourness and inflame the pepper.

Three to reach for. Torrontes (Salta); Grüner Veltliner (Wachau); off-dry Riesling (Mosel Kabinett).