Ascaridole
Also written epazote compound
Quick answer
The camphorous, faintly petroleum-like compound that defines epazote — an organic peroxide, unusual among culinary aromatics, and the reason the herb is both distinctive and dose-limited.
What it does
Ascaridole is what epazote tastes of, and the descriptions people reach for — camphor, turpentine, creosote, wet tarmac — say more about how unlike other herbs it is than about whether it is pleasant. In small quantity against beans it reads as a savoury depth rather than as any of those things, which is the only context most people meet it in. It has essentially no analogue in the culinary world: no other herb in common use is dominated by a peroxide, and that is why the epazote substitution record has to say plainly that there is no substitute.
How it behaves when cooked
Four properties of the molecule, and what they mean at the stove.
- Volatility
- high
- Fat solubility
- high
- Water solubility
- low
- Heat stability
- low
Volatile and heat-labile, and unstable in a way most aromatics are not: ascaridole is an organic peroxide and decomposes with heat and light, which is why epazote is dried in shade rather than sun and why the dried herb keeps a fraction of the fresh. It is also why a long-simmered bean pot ends up tasting far less of epazote than the quantity added would suggest — much of it has gone. The traditional handling, a sprig added part-way through rather than at the start, is a practical response to that.
Spices that carry it
Recorded on the compound rather than on each spice, so the two cannot disagree.
- EpazotePrincipal component
The whole of the herb’s character, and the reason the profile records both its flavour and its dose limits against the same compound.
Not to be confused with
Compounds a reader is likely to take for this one, and why they differ.
Thymol
The other strongly medicinal culinary aromatic, in thyme and ajwain. Thymol reads as clean and antiseptic; ascaridole reads as camphorous and petroleum-like, and the two are not mistaken for each other by anyone who has met both.
Questions this page answers
- what is ascaridole
- what makes epazote taste like that
- is epazote safe to eat
- why does epazote taste of petrol