
Cinnamon powder is a warm baking spice made from the dried inner bark of Cinnamomum trees, ground to a fine powder.
Cinnamaldehyde drives the profile: a warm, sweet-woody spice note, with a faintly pungent, low-bitter edge that is milder in Ceylon and sharper in cassia.
Reached for when a drink needs a warm aromatic finish, cinnamon powder is dusted over foam or the surface of creamy and hot drinks, or worked into a rim; because the fine powder does not dissolve, it clouds a drink and settles as grit unless bound in a syrup or fat, so it is dosed in a pinch as an accent rather than stirred in as a measure.
Another cinnamon form — a stick, cinnamon syrup, or a cinnamon bark tincture — reproduces the cinnamaldehyde aroma that defines it; an unrelated warm spice such as nutmeg, allspice or clove gives a different signature, not cinnamon.
Cassia cinnamon
Ceylon cinnamon (C. verum) is milder, more delicately sweet and low in coumarin, while cassia (C. cassia and relatives) is stronger, more pungent, cheaper and much higher in coumarin. Both are sold simply as 'cinnamon' with no species label, and most generic supermarket powder is cassia.
The spice comes from the bark of a few tree species in the genus Cinnamomum, chiefly Ceylon cinnamon (Cinnamomum verum, 'true cinnamon') and cassia cinnamon (mainly Cinnamomum cassia); the bark is dried and milled to a fine powder. Its aroma and flavour derive from an essential oil dominated by cinnamaldehyde, alongside constituents such as eugenol. Cassia carries substantially more coumarin than the low-coumarin Ceylon type, and most powder sold generically as 'cinnamon' is cassia.
Ground cinnamon loses aroma faster than whole bark once the volatile oil is exposed; keep it sealed away from heat and light and replace it as the scent fades.