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Dry heat drives volatile compounds to the surface and browns them slightly. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Mondo Knows Facts

Toasting whole spices releases their aromatic oils

Dry heat drives volatile compounds to the surface and browns them slightly

Spices keep their aroma locked in cells and resin pockets until heat and friction rupture them. Toasting whole seeds in a dry pan for a minute or two volatilises those oils and starts a little Maillard browning, which deepens the flavour. Ground spices burn faster because the surface area is far larger.

Where this comes from

Encyclopaedia Britannica

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Tags: spices, toasting, aroma

Toasting whole spices releases their aromatic oils: the short answers

Where does this come from, and can I check it?: Dry heat drives volatile compounds to the surface and browns them slightly. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a food fact?: Yes. It sits on the Food shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.