Cinnamon
What it is
Cinnamon is the dried inner bark of trees in the genus Cinnamomum. Two commercially distinct products share the name. Ceylon cinnamon ("true cinnamon," Cinnamomum verum) comes from Sri Lanka and southern India: pale tan, papery, fragile, rolled into a quill made of many thin, brittle layers — it crumbles easily and can be ground in a spice grinder or even a coffee mill. Cassia ("Chinese cinnamon") is a group of related species — C. cassia (China), C. burmannii (Indonesia/Korintje, the dominant supermarket cinnamon in North America), and C. loureiroi (Vietnamese/Saigon, the most intense). Cassia bark is thick, hard, reddish-brown, and rolls into a single dense curl that resists grinding.
How it's made
Shoots are coppiced from the tree, the outer bark scraped away, and the inner bark peeled in strips. As the strips dry they curl into quills. Ceylon quills are hand-rolled, the thin layers nested together — a skilled, labor-intensive craft. Cassia is simply dried into its hard tube.
Flavor profile
The shared signature compound is cinnamaldehyde, but the concentration differs sharply: cassia runs roughly 90% cinnamaldehyde, Ceylon closer to 50–60%, with a larger fraction of eugenol and other complex aromatics. Cassia is therefore bolder, hotter, sweetly pungent — the "Red Hots" candy and cinnamon-roll flavor most Westerners think of as cinnamon. Ceylon is more delicate, citrusy, floral, and layered, with less of that hot bite.
Culinary uses
Cassia stands up to long cooking and bold company — mulled wine, Mexican chocolate and café de olla, chai, Chinese five-spice and braises, North African tagines. Ceylon shines where its subtlety can be noticed — fine baking, custards, fruit, light curries, the spice blends of Sri Lankan and South Indian cooking. Whole quills infuse liquids cleanly; ground cinnamon (almost always cassia in the West) blooms fast in fat. Toasting whole bark briefly deepens the aroma; toasting ground cinnamon scorches it.
Regional variations
Sri Lanka (Ceylon) is the home of true cinnamon. Indonesia (Korintje) supplies most American "cinnamon." Vietnamese (Saigon) cassia is the most cinnamaldehyde-rich and aggressive. Chinese cassia (gui pi) appears in five-spice and traditional medicine.
Cultural & historical context
Cinnamon is one of the oldest and most mythologized trade goods on Earth — burned in Egyptian embalming, named in the Hebrew Bible, prized in Rome. For centuries Arab middlemen guarded its source with deliberate fictions (giant "cinnamon birds" that built nests of the bark in inaccessible cliffs) to protect their monopoly and justify the price. The Portuguese seized Sri Lanka's cinnamon trade in the 16th century, the Dutch took it in the 17th, the British in the 18th. The crucial modern distinction is health, not just flavor: cassia is high in coumarin, a naturally occurring compound that is anticoagulant and hepatotoxic in quantity (European food-safety agencies set tolerable daily intakes partly because of cassia in pastries and supplements). Ceylon contains only trace coumarin. For anyone consuming cinnamon daily, the difference is not pedantry — it's the difference between a flavoring and a liver concern.
Reference notes
Tags: `Whole` (quills), `Ground/Powdered`, `bark spice`, `warm spice`. Flag a `species` attribute (`verum` vs `cassia`) on any cinnamon product — this is exactly the kind of distinction a Cuisineer should be able to filter on. Related ingredients: Cassia buds, Star anise, Clove, Cardamom. Related cuisines: Sri Lankan, Mexican, Moroccan, Chinese, Levantine. Suggested links: → Clove, → Cardamom, → Star Anise, → Garam Masala.