Lemongrass Cymbopogon citratus
Bruise it, don't chop it. Only the pale lower third is tender enough to eat, and the rest is there to perfume the pot and come back out.
Ingredient reference image: AI-generated. Recipe photography is my own.
In the kitchen
Bruise the whole stalk
For a soup or curry, trim the base, peel off the dry outer layers, then whack the stalk flat with the back of a knife and drop it in whole. It gives everything up and lifts out cleanly at the end.
Or slice it paper thin
If it is staying in the dish, it must be sliced across the grain as thinly as you can manage, from the pale base only. Anything thicker is genuinely unpleasant to chew — the fibre does not soften.
It takes long cooking
Unlike most fresh aromatics, lemongrass holds up through an hour in a pot. Into the broth at the start, alongside the galangal and the lime leaf, not stirred in at the end.
Beyond the kitchen
IT IS A GRASS
Cymbopogon is a genus of true grasses, and the same genus gives citronella and palmarosa. Lemongrass grows in dense clumps and a single stalk stood in water will root and start a plant.
CITRONELLA
Citronella oil, the mosquito repellent in candles and sprays, comes from related Cymbopogon species. Lemongrass itself is used similarly in parts of Asia, planted around houses and burned as a deterrent.
A GLOBAL FLAVOURING
Citral extracted from lemongrass is used industrially as a lemon flavouring and as a starting material in the synthesis of vitamin A and of ionones used in perfumery.
TEA
Lemongrass tea is an everyday drink across Southeast Asia, Africa and Latin America, usually from the green tops that would otherwise be discarded — the part of the plant a Western recipe throws away.
A longer history
Lemongrass is native to maritime Southeast Asia and has been cultivated across the tropics for centuries, moving with Austronesian and later Indian Ocean trade into South Asia, Africa and eventually the Americas. It grows readily anywhere warm and wet, which is why it naturalised so widely.
It is fundamental to Thai, Vietnamese, Khmer, Lao, Indonesian and Malaysian cooking, where it forms part of the aromatic base alongside galangal, makrut lime and chili — tom yum, curry pastes, lemongrass-stuffed grilled fish, satay marinades. In Sri Lankan and southern Indian cooking it appears more sparingly.
Western kitchens met it late, largely through the spread of Thai restaurants from the 1970s onward, and it remains one of the ingredients that most reliably signals Southeast Asian cooking on a Western shopping list. Commercial oil production is centred on India, Guatemala and China.