Makham — Tamarind Processing Techniques / มะขาม

Central Thai and Isaan primarily — South uses lime more frequently; tamarind trees are planted outside most Thai homes throughout the country

Tamarind (Tamarindus indica) provides the primary souring agent in Thai cooking — fruity, deep acid that is distinctly different from lime's sharpness or vinegar's one-dimensionality. In Thai kitchens, tamarind is used in three forms: fresh pods (ripe, sweet, often eaten as a snack), compressed block tamarind (makham piak, dried pulp with seeds and fibre, reconstituted in warm water), and ready-made concentrate. The block form is the professional standard — you tear off a golf-ball amount, soak in warm water for 5 minutes, then squeeze and press through fingers to extract the thick paste, discarding seeds and fibre. Concentration of the resulting liquid is the critical variable in most dishes.

• Imli in Indian cooking is the same ingredient, same extraction method; Cambodian samlar dishes use tamarind in identical proportion; the sweet-sour acid function parallels kokum in Goan curries.

Tamarind's deep fruity acid interacts differently with fish sauce than lime does — it softens the brininess while adding complexity, which is why pad thai tastes warm and rounded rather than sharp.