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Camphor

Also written camphor (bicyclic ketone)

Oxygenated monoterpenoidC10H16OAromaTrigeminal sensation

Quick answer

The heavy, penetrating, medicinal note that lurks behind rosemary, sage and lavender — the compound responsible for the moment a herb tips from aromatic to soapy.

What it does

Camphor is cold, penetrating and unmistakably medicinal, with a cooling sensation on the tongue. In small amounts it gives rosemary, sage and lavender their characteristic backbone and their clean edge. In larger amounts, or after the lighter aromatics have gone, it is what those herbs taste of, and it is why overcooked rosemary tastes of pine disinfectant and why too much lavender in a dessert tastes of soap. Coriander seed carries a small amount that contributes to its warmth without reading as camphorous at all.

Strong evidenceSources: On Food and Cooking: The Science and Lore o…; Chemistry of Spices

How it behaves when cooked

Four properties of the molecule, and what they mean at the stove.

Volatility
moderate
Fat solubility
high
Water solubility
low
Heat stability
high

Camphor is more persistent and more heat-stable than the aromatics it accompanies, and that asymmetry is the single most useful thing to know about cooking with rosemary, sage and lavender. Cooking those herbs does not weaken them evenly — it removes the pleasant volatile fraction first and leaves the camphor behind, so the result is not milder but more medicinal. That is why rosemary is used as a whole sprig added late and removed, why fried sage leaves are cooked for seconds rather than minutes, and why culinary lavender is infused briefly and strained. It is also why these three herbs are so often reported as having ruined a dish when the cook simply used the normal amount and cooked it for the normal time.

Strong evidenceSources: On Food and Cooking: The Science and Lore o…; Established culinary practice

Spices that carry it

Recorded on the compound rather than on each spice, so the two cannot disagree.

Not to be confused with

Compounds a reader is likely to take for this one, and why they differ.

  • 1,8-Cineole

    The two together are what "medicinal" means in these herbs. Cineole is the lighter, fresher, more eucalyptus-like of the pair and goes first; camphor is heavier and stays.

Questions this page answers

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