Makrut lime
Citrus hystrix · Rutaceae · also known as Thai lime, Kieffer lime, Jeruk purut, Kaffir lime (an older name now widely avoided)
The bumpy, warty lime whose double-lobed leaves perfume tom yum, green curry, and half the kitchens of Southeast Asia. The fruit gives little juice — this is a citrus you cook with, prized for zest and leaf rather than the glass.
At a glance
- Taste
- Intensely aromatic — the zest and leaves burst with a lemongrass-citronella perfume; the scant juice is sharp and slightly bitter, more seasoning than beverage.
- Origin
- Southeast Asia (likely Indonesia and the Malay Peninsula)
- Grown in
- Thailand, Indonesia, Malaysia, Cambodia, Laos, Sri Lanka, Philippines
- Peak season
- Year-round
- Notable varieties
- Standard makrut (grown for leaf as much as fruit)
Sensory & practical profile
Taste fingerprint
- Sweetness
- Tartness
- Aroma
- Juiciness
- Firmness
Approximate, at peak ripeness · 0–5
- Ripe when
- Used green and firm; the bumpier and more fragrant the rind, the better. Yellow fruit is fine for juice but past peak aroma.
- How to eat
- Don't eat it out of hand — zest the rind, tear the leaves into soups and curries, and use the sparse juice like a potent seasoning.
- Typical price
- Everyday
One tree feeds a whole neighborhood's curry habit — Thai cooks value the leaves so highly that the fruit is almost a by-product.
When it's in season, by region
| Region | Peak months |
|---|---|
| Southeast Asia | Year-round in the tropics, flushing after rains |
How to select & store
Picking a ripe one
For fruit: deep green, heavily bumpy, fragrant when scratched. For leaves (the real prize): glossy, unbroken double lobes with a strong scent when torn — avoid dry, dull, or yellowing leaves.
Storing it
Whole fruit keeps 1–2 weeks refrigerated. Leaves keep a week fresh, but freeze beautifully in a zip bag for months — most Thai cooks keep a frozen stash. Zest can be frozen too.
Practical uses
🍽️ Culinary
- Leaves torn into tom yum, tom kha, and curries across Thailand, Cambodia, and Laos
- Zest pounded into Thai curry pastes — the signature top note of green curry
- Rind and juice in Indonesian sambals and Balinese spice pastes
- Leaves sliced hair-thin over fish cakes (tod mun) and salads
🌿 Health & traditional
- Juice and rind used across Southeast Asia in traditional tonics and hair rinses
- The essential oil is a traditional insect repellent
🎎 Cultural
- Used in ritual cleansing water in Thai and Balinese ceremonies
- The English name is shifting to "makrut" (from Thai makrut) because the older name is a slur in southern Africa
Some citrus are grown for juice, some for the hand fruit bowl — the makrut lime is grown for the air around it. Its warty rind and hourglass leaves hold citronellal-rich oils that smell like lime crossed with lemongrass, and that scent is one of the foundation notes of Southeast Asian cooking.
The leaf is the fruit
Recipes calling for “kaffir lime leaves” (the name is fading — makrut is the respectful modern term) mean the glossy double-lobed leaves of this tree. Torn, they perfume tom yum; sliced hair-thin, they finish Thai fish cakes; pounded, they go into curry pastes with the zest. The juice, by contrast, is scant and slightly bitter — for a drinkable Southeast Asian citrus, reach for calamansi or regular lime.
Cooking with it
Treat makrut like a bay leaf with a citrus soul: bruise or tear leaves and let them infuse coconut-milk curries and soups, then fish them out (or eat around them). A quarter-teaspoon of grated zest is enough to announce itself in a whole batch of green curry paste. The classic flavor triangle is makrut + coconut + chili — the backbone of tom kha gai.
Growing and buying
The tree is hardy for a tropical citrus and widely grown in pots by homesick cooks worldwide; leaves freeze so well that a single healthy plant covers a household. Buying tip: Asian groceries often sell frozen leaves — they’re nearly as good as fresh, unlike the dried ones, which lose most of the magic.
