Makrut Lime Leaves Citrus hystrix
The most concentrated citrus aroma available to a cook, and it comes from a leaf rather than a fruit. Two leaves perfume a whole pot.
Ingredient reference image: AI-generated. Recipe photography is my own.
In the kitchen
Tear, do not chop
For a soup or curry, tear the leaves roughly along the spine and drop them in whole. Tearing releases the oil; the leaf itself stays too tough to eat and gets pushed aside.
Or shred them like tobacco
When they are meant to be eaten — in a Thai fish cake or a salad — the spine is cut out and the leaf is rolled and sliced into hair-fine threads. Anything coarser is leathery.
Two leaves is a lot
The aroma is extraordinarily concentrated and builds in a broth. Two torn leaves are right for a large pot of curry; six make it taste of perfume.
Beyond the kitchen
THE NAME
The older English name uses a word that is a severe racial slur in southern Africa, and makrut — from the Thai — is now the preferred term in most food writing and increasingly on packaging. Both names are given here so the page is findable either way.
A CITRUS ANCESTOR
Citrus hystrix is one of the wild citrus species that sits near the base of the family, alongside citron, pomelo and mandarin — the small group from which almost all cultivated citrus descends by hybridisation.
HAIR AND SKIN
The fruit's juice and rind have long been used across Southeast Asia in shampoo and cleaning preparations, and the plant appears in Thai and Indonesian household use well beyond the kitchen.
IMPORT RESTRICTIONS
Live citrus material is tightly controlled in many countries because of disease risk, which is why fresh leaves can be hard to find in some markets and why frozen has become the practical standard.
A longer history
Citrus hystrix is native to tropical Southeast Asia and has been used across the region for centuries in cooking, household preparations and ritual. Unlike most citrus, it was never selected for its fruit — the leaf and the rind are the valuable parts, and the fruit is knobbled and nearly dry.
It is fundamental to Thai, Lao, Khmer, Malaysian and Indonesian cooking, where it joins lemongrass and galangal in the aromatic base of soups, curries and pastes. In Indonesian cooking it appears alongside a related leaf, daun jeruk purut, in much the same role.
Western availability arrived with Southeast Asian restaurants and immigration in the later twentieth century, and frozen leaves are now standard in Asian groceries across Europe and North America. The shift in English-language naming, from the older term to makrut, has happened largely within the last decade.