If fresh cilantro tastes like soap to you, the sensation is a real flavor perception, not an imaginary preference. Some of cilantro’s aroma comes from aldehydes, a family of fragrant molecules. Genetic differences affecting how people smell some of these compounds appear to help explain why the herb tastes bright and citrusy to one person but unpleasantly soapy to another.
What exactly makes cilantro smell soapy?
Cilantro leaves release an assortment of aromatic aldehydes when chopped or crushed. Some resemble compounds associated with soaps and fragrances. Flavor is a combination of taste and smell, so the nose can strongly influence whether the herb seems appetizing.
The same plate of food can therefore be experienced very differently by two diners, even though the ingredients are identical.
What scientists learned about genetics
A 2012 genome-wide association study involving thousands of participants found a statistical link between reporting a soapy cilantro taste and a genetic variant near a cluster of odor-receptor genes. One plausible candidate was OR6A2, an olfactory receptor responsive to some aldehydes.
This is an association, not a single-gene on/off switch. The study found that common genetic variants explained only a modest share of differences. Culture, repeated exposure, context and individual sensitivity may also affect whether someone enjoys cilantro.
Can you make cilantro taste better?
You may find a small amount of finely chopped cilantro more tolerable than a large fresh garnish. Mixing it into a sauce with lime, yogurt or other strong flavors can reduce its dominance. Some people prefer cooked dishes to raw leafy garnishes, though heat changes the herb’s aroma and does not guarantee a different experience.
For guests, serve chopped cilantro separately instead of stirring it into an entire batch of tacos or guacamole. Flat-leaf parsley can provide green freshness, though it will not reproduce cilantro’s flavor.
Cilantro versus coriander: are they the same plant?
In American recipes, cilantro generally refers to the leaves and tender stems of Coriandrum sativum, while coriander often means its dried seeds. The seeds have a different flavor profile, so disliking cilantro leaves does not necessarily mean disliking coriander spice.
Frequently asked questions
Is a soap taste proof of a food allergy?
No. Perceiving a soapy flavor is not itself an allergy diagnosis. If you have symptoms such as swelling, hives or breathing trouble, seek appropriate medical care.
Does everyone with a particular gene hate cilantro?
No. The identified variant is associated with perception but does not determine every individual’s preference.
Can parsley replace cilantro?
Often as a green garnish, yes, but it contributes a different taste.
More helpful reading
For further reading: Eriksson and colleagues, Flavour (2012).
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