Ма-кхвен

Ma-kwaen (Zanthoxylum limonella) is a Thai species of prickly ash tree whose berries produce a citrusy, numbing spice used in northern Thai cuisine, particularly in the Lanna region. The berries contain hydroxy-alpha-sanshool, the compound responsible for the characteristic tingling-numbing sensation shared with Sichuan pepper (Z. bungeanum).

The essential oil, steam-distilled from the berries, is rich in limonene and other citrus terpenes, giving it a bright, lemon-lime character that distinguishes it from other Zanthoxylum species. The numbing compound (sanshool) does not distill readily, so the oil captures the citrus but not the tingle.

In perfumery, ma-kwaen provides an unusual citrus-spice note that is distinctly different from conventional citrus oils. Its Southeast Asian origin gives it cultural specificity for compositions evoking Thai cuisine and northern Thai landscapes.

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