Galangal vs ginger

Close relatives in the same family that taste nothing alike. One is pine and citrus, the other is heat, and substituting either way changes a dish or a drink completely.

botanical

What is being compared

Why these get confused

Sold beside each other and often labelled 'Thai ginger', which is neither accurate nor helpful.

Point by point

AspectGalangalGinger
FlavourSharp and pine-like with a soapy citrus note, and very little warming heat.Warming, pungent heat with a clean bite and a faint sweetness behind it.
The rhizomePaler, much harder, and impossible to grate — it is sliced or pounded.Softer and juicier, and grates readily, which is how most kitchens use it.
Where it belongsTom kha, Thai curry pastes, Indonesian jamu and regional Southeast Asian infusions.Almost everywhere: Europe, the Caribbean, East Asia, South Asia, as drink and as spice.
Fresh versus driedDried loses most of the pine character and is a poor substitute for fresh.Fresh is brighter and dried is hotter; both are genuinely useful and not interchangeable.
In EuropeFamiliar in medieval kitchens and almost entirely gone from European cooking by 1700.Continuously present since the classical period and never left.

The short answer

A Thai recipe calling for kha wants galangal and will be wrong with ginger. The reverse is equally true, and the two are not grades of one plant.

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