Wayanad cinnamon vs cassia — what your candle is actually burning

The short answer: most cinnamon candles are not burning cinnamon. They are burning cassia — Cinnamomum cassia — a related but chemically distinct species that costs 4–6 times less than true cinnamon (Cinnamomum verum) and behaves very differently under heat.

The distinction matters more in a candle than it does in a spice rack. Here is why.

The coumarin difference

Cassia contains coumarin at levels of 2,000–12,000 mg per kilogram of dry weight. Ceylon cinnamon — Cinnamomum verum — contains trace amounts, typically under 50 mg per kilogram. That is a difference of roughly two orders of magnitude.

Coumarin is a naturally occurring lactone compound. At low ambient concentrations, it reads as sweet — pleasantly warm, vaguely vanilla-adjacent. But it has a sharp, slightly medicinal edge that becomes more pronounced as temperature rises. A burning candle creates sustained heat at the wax surface. Under those conditions, coumarin volatilises quickly and in volume. This is why cassia candles smell intense and slightly harsh for the first twenty to thirty minutes of burning, then fade. The coumarin is the loudest thing in the room, and it does not last.

Ceylon cinnamon's aromatic character comes primarily from cinnamaldehyde and eugenol, with coumarin barely present. Cinnamaldehyde is warmer and rounder — honey-edged, slightly sweet — without the sharp top note that coumarin introduces. It does not rush out of the wax. It builds slowly and holds.

Why Wayanad specifically

Wayanad district in Kerala sits at 700–900 metres in the Western Ghats. The elevation matters: cooler temperatures slow the growth of the cinnamon tree, which concentrates the aromatic compounds in the inner bark. The south-west monsoon delivers heavy, sustained rainfall — the kind of water-stress and wet-dry cycling that produces bark with a noticeably fuller aromatic profile than cinnamon grown at lower elevations in more uniform humidity.

The harvesting process is also distinct. Wayanad cinnamon is hand-peeled — workers strip the outer bark from young shoots, then peel away the thin inner bark in layers, which are rolled into the papery quills that distinguish genuine Cinnamomum verum from cassia. Cassia quills are single thick sheets of combined outer and inner bark, noticeably harder. The difference is visible and tactile before you smell anything.

After peeling, the quills are shade-dried rather than sun-dried. This is not tradition for tradition's sake. Sun drying at elevated temperatures drives off the more volatile top-note compounds — particularly the lighter terpene fractions — before the quills are even processed into essential oil. Shade drying preserves them. The result is an essential oil with more top-note complexity and a longer aromatic arc.

Wayanad is one of only a few regions in India where Cinnamomum verumis grown commercially at scale. Most cinnamon labelled as Indian on the wholesale market is either imported Sri Lankan cinnamon or is actually cassia — grown in Assam and Manipur — sold under a broader "cinnamon" label. The distinction is rarely enforced at the retail level.

The technical problem: a flashpoint of 50°C

Ceylon cinnamon essential oil has a flashpoint of approximately 50°C. Most fragrance oils used in candle making have flashpoints of 70°C and above. Soy wax 464 — the wax we use — is typically poured between 65°C and 75°C in standard candle production.

The implication is direct: if you add Ceylon cinnamon essential oil to wax at standard pouring temperature, a portion of the most volatile aromatic compounds — the cinnamaldehyde fractions responsible for the honey-edged warmth — will volatilise into the air before the candle sets. You get a beautifully scented workshop and a candle that underperforms on hot throw.

The solution is temperature discipline. We blend the cinnamon essential oil into the wax at 55–60°C — below the flashpoint threshold where significant aromatic loss begins — then pour immediately. The wax needs to be fluid enough to pour cleanly but cool enough to retain the fragrance. This is a narrower window than most fragrance formulations require, and it cannot be rushed or approximated. It is the primary reason most mass-market candle manufacturers do not use real cinnamon essential oil — the process is slower, the tolerance is tighter, and a synthetic cassia fragrance oil requires none of this precision.

What it smells like — and what cassia smells like

A cassia candle announces itself. The coumarin volatilises quickly from the warm wax pool, fills the room in the first burn session, and then recedes. It is recognisable — most people would identify it as "cinnamon" without hesitation — but it has an edge. A slight sharpness at the back of the inhale. It reads as spice more than warmth.

Wayanad cinnamon is different in character, not just intensity. The opening is softer — the cinnamaldehyde builds across the first fifteen minutes rather than front-loading. It settles into something that registers as warm first and spiced second: honey-adjacent, slightly woody underneath, with no sharp top note. It does not fade the way cassia fades. It holds a consistent aromatic presence across the burn because the compounds responsible for it are heavier and volatilise more evenly from the wax surface.

The difference is not subtle once you have experienced both side by side. One smells like a spice market. The other smells like the room where spices are kept.

Why we source from Wayanad, not a fragrance supplier

A fragrance ingredient supplier would sell us a cinnamon accord — cinnamaldehyde-forward, stabilised, consistent batch to batch, designed to behave predictably in wax. It would smell like cinnamon. It would work.

It would not smell like Wayanad. It would not contain the eugenol fractions, the minor terpene compounds, the hundreds of trace aromatic molecules that exist in concentrations too small to synthesise economically but collectively responsible for the depth that makes the oil smell like a specific place rather than a category.

We source Wayanad Cinnamomum verum essential oil directly and note the origin on the candle. The extra production discipline — the temperature window, the cure time of 7–14 days before the first burn — is the cost of using a real ingredient. We think it is a reasonable trade.