What Is Cilantro and What Does It Taste Like? A Beginner’s Guide

Quick answer: what cilantro is

Cilantro is the fresh leaves and tender stems of Coriandrum sativum, an annual herb in the carrot family (Apiaceae). The same plant produces the round, tan seed sold as the spice coriander. In the United States and Canada, "cilantro" means the leaf and "coriander" means the dried seed. In Britain, Australia, and most of the rest of the English-speaking world, the whole plant is called coriander and the seed is "coriander seed" — the plant never changed, only the label did.

It also travels under a lot of other names: Chinese parsley, dhania in South Asia, ngò rí in Vietnam, and kothmir. Watch out for "Mexican coriander", which usually refers to a different plant entirely — see the substitutes section below.

Cilantro vs coriander: same plant, different part

This is the single most common point of confusion, and it is worth settling before anything else.

• Cilantro (US) = the fresh green leaves and stems. Bright, citrusy, herbal. Used raw or added at the very end of cooking.
• Coriander (US) = the dried seed. Warm, nutty, faintly of orange peel. Used toasted and ground, early in cooking.
• Coriander (UK and elsewhere) = the whole plant, with "coriander seed" specified when the spice is meant.

The two taste almost nothing alike, which surprises people who assume a plant's leaf and seed should be related in flavour. They are not interchangeable in a recipe, and substituting one for the other is the fastest way to make a dish taste wrong.

How to tell cilantro from flat-leaf parsley

In a shop they sit side by side and look nearly identical, and they are regularly mixed up — including by the shop. Three checks settle it in seconds.

• Smell it. This is the only test that never fails. Rub a leaf between your fingers. Cilantro is loud, citrusy, and unmistakable; parsley is faint, grassy, and almost neutral by comparison.
• Look at the leaf edges. Cilantro's lower leaves are rounded and scalloped, like a fan cut into soft lobes. Flat-leaf parsley leaves are pointed, with sharper serrations and a distinct spear shape.
• Look at the colour. Cilantro tends to a lighter, slightly yellow-green; parsley is darker and glossier.

One thing that confuses even experienced cooks: cilantro's leaves change shape as the plant ages. The rounded lower leaves give way to thin, thread-like upper leaves once the plant starts to bolt — so a bunch can contain two leaf shapes that look like two different herbs. Both are cilantro; the feathery ones simply came from higher up a plant that was getting ready to flower.

Where cilantro is used, and how much

Cilantro is one of the most widely eaten fresh herbs on earth, and the quantities involved differ enormously by cuisine.

• Mexican and Central American — salsas, tacos, pozole, guacamole. Used generously, almost always raw.
• Vietnamese and Thai — ngò rí in pho and noodle bowls, in fresh spring rolls, and pounded with root and stem into curry pastes.
• Indian and South Asian — dhania in chutneys, scattered over dals and curries at the end, blended into green chutney by the bunch.
• Middle Eastern and North African — in chermoula, in soups, alongside parsley rather than instead of it.
• Chinese — Chinese parsley, used sparingly as a top note in soups and cold dishes.

What almost none of these traditions do is cook it. Across very different cuisines, cilantro arrives at the end — a pattern that follows directly from how quickly heat destroys its aroma.

What cilantro tastes like

To most people, cilantro tastes bright, green, and citrus-adjacent — a clean lemon-lime lift with a peppery edge and a cool finish. It reads as fresh rather than rich, which is why it belongs on top of a dish rather than inside it.

Three details are worth knowing:

• The stems carry more flavour than the leaves. Thin cilantro stems are tender and intensely aromatic. Throwing them away discards the best part; chop them finely and use them along with the leaves.
• Heat destroys it. The aroma compounds are volatile and largely gone within a minute or two of real heat. Cilantro added at the start of a simmer contributes almost nothing by the time the dish is served.
• The flavour fades before the colour does. A wilting bunch loses its brightness first, so cilantro that still looks acceptable can already taste flat.

And for a substantial minority of people, none of the above applies — it tastes like soap.

The soap problem: why cilantro tastes like detergent to some people

This is real, it is not fussiness, and it has a documented biological basis.

Cilantro leaves contain aldehydes — compounds from the same chemical family found in soaps and some lotions. Most people's noses read those aldehydes as one part of a fresh, citrusy whole. Some people carry a variant near a cluster of olfactory receptor genes, OR6A2 among them, that makes them unusually sensitive to exactly those compounds, and the soapy note then dominates everything else.

Twin studies and large genetic surveys have both found the effect, and the share of people affected varies sharply by ancestry — reported at a few percent in some populations and considerably higher in others. That variation is why an entire table can disagree about the same bowl of noodle soup in complete good faith.

Two things soften it for people on the fence: chopping or crushing the leaves, which lets the plant's own enzymes break down some of the offending aldehydes, and repeated exposure, which genuinely shifts perception for some people over time. Neither works for everyone, and there is nothing wrong with simply not liking it.

The mechanism, the genetics, and what actually helps are covered in more depth in why cilantro tastes like soap to some people.

How to cook with cilantro

One rule covers most of it: add it at the end, off the heat. Scattered over a finished dish, stirred into a sauce after it leaves the stove, or blended raw.

• As a finishing herb. Tacos, curries, noodle soups, grilled meat, roasted vegetables, fried eggs. A handful thrown on at the table.
• In raw sauces. Chimichurri, chutneys, salsa verde, zhoug, herb-heavy yoghurt. Here cilantro is the main ingredient rather than a garnish, and quantity matters — half a bunch, not a sprinkle.
• Stems in the cooking base. The one exception to the end-of-cooking rule. Thai and Vietnamese cooking often pounds cilantro roots and lower stems into a paste at the start, where their flavour holds up better than the leaf's.
• With acid. Lime, lemon, vinegar, tamarind — cilantro and acid sharpen each other.

More applications, including several that are not obvious, are collected in 10 practical uses for cilantro.

Buying and storing cilantro

Buy bunches with firm, deep-green leaves and stems that stand up rather than flop. Yellowing edges, blackened stem ends, or a wet, slippery feel all mean it is on the way out.

The storage method that works best treats it like a cut flower:

• Trim a centimetre off the stem ends.
• Stand the bunch in a glass with an inch of water.
• Cover loosely with a bag and refrigerate.
• Change the water every couple of days.

That reliably buys a week to ten days, against two or three days for a bunch left in its shop bag. Washing before storage shortens its life rather than extending it — wash just before use.

Cilantro does not dry well. The dried product loses the volatile compounds that make it worth eating and ends up tasting of hay. Freezing works better: chop leaves and stems, pack them into an ice cube tray with a little water or oil, and drop a cube into cooked dishes. The texture is gone but the flavour survives.

Growing cilantro at home

Cilantro is easy to germinate and easy to lose, and the reason is almost always the same: it bolts. Once the plant senses long days or heat, it stops making leaves and rushes to flower and set seed, and the leaves it does produce turn thin, ferny, and bitter.

What actually helps:

• Sow in cool weather. Spring and autumn. In hot climates, cilantro is a winter crop.
• Sow repeatedly. A small pinch every two to three weeks beats one large sowing, because every plant will bolt eventually regardless.
• Give it afternoon shade once temperatures climb.
• Do not transplant it. Cilantro has a taproot and resents being moved; it often bolts in protest. Sow it where it is going to grow.
• Let the last sowing flower. The flowers feed hoverflies and parasitic wasps, and the seed that follows is coriander spice — one plant, two harvests.

A windowsill jar of water will keep cut stems going for a while too; that method is set out in growing coriander at home in water. To start from seed, we sell cilantro (Coriandrum sativum) seed.

Cilantro substitutes, and the one that is not a substitute

Nothing replaces cilantro exactly. What follows is what to reach for, depending on why you need a replacement.

• Flat-leaf parsley — the safe default when someone at the table is a soap-taster. Green and clean, without the citrus note. Closest in appearance, not in flavour.
• Thai basil or mint — for Southeast Asian dishes. Different, but they fill the same bright, raw-herb role.
• Parsley plus a squeeze of lime — a workable reconstruction of cilantro's freshness and acidity together.
• Culantro (Eryngium foetidum) — not a substitute so much as a stronger relative. Long serrated leaves, several times the intensity, and unlike cilantro it survives heat and long cooking. A different species in the same family, sold as recao, ngò gai, sawtooth coriander, or sometimes Mexican coriander.

Culantro is the right answer for anyone who loses their cilantro to summer heat every year: it thrives in exactly the conditions that make cilantro bolt. The comparison is worked through in culantro vs cilantro, tested in summer heat, and the seed is here: culantro / sawtooth coriander seed.

Nutrition, briefly and honestly

Cilantro is a leafy green herb, and nutritionally it is what that description suggests: low in calories, a source of vitamin K, with vitamin A, vitamin C, and a range of plant compounds in the amounts you would expect from a garnish.

The honest caveat is portion size. Most nutrition figures quoted for herbs are calculated per 100 grams — an enormous quantity of cilantro, several bunches of it. A realistic garnish is two or three grams. Cilantro is a good thing to eat and a poor thing to rely on for nutrients, and claims that it detoxifies heavy metals or treats specific conditions go well beyond what the evidence supports.

Frequently asked questions

Is cilantro the same as coriander?

They are the same plant, Coriandrum sativum. In American usage, cilantro is the fresh leaf and coriander is the dried seed. In British and most other English usage, the whole plant is coriander and the spice is called coriander seed.

Why does cilantro taste like soap to me?

Cilantro contains aldehyde compounds also found in soap. A genetic variant near a cluster of olfactory receptor genes, including OR6A2, makes some people highly sensitive to those compounds, so the soapy note overwhelms the citrus one. It is a difference in perception, not in the herb.

Can you eat cilantro stems?

Yes. The thin stems are more aromatic than the leaves and should be chopped and used with them. Only the thick, fibrous lower stalks are worth discarding, and even those can be pounded into a paste for cooking bases.

How do you keep cilantro fresh longer?

Trim the stem ends, stand the bunch in a glass with an inch of water, cover it loosely with a bag, and refrigerate, changing the water every few days. That keeps it usable for a week to ten days. Wash it just before use, not before storing.

Why does my cilantro flower and go bitter so quickly?

It is bolting, triggered by heat and long days. Sow in cool seasons, sow a small amount every two to three weeks, give it afternoon shade, and never transplant it. In hot climates, grow culantro instead — it handles heat that cilantro cannot.