Korintje Cinnamon: Indonesian Cassia, Its Flavor, Uses and Coumarin

Korintje cinnamon may well be what’s in your spice drawer. Frontier Co-op, which sells it under the Korintje name, calls it the cinnamon most commonly found in American kitchens.¹ It’s the bark of Cinnamomum burmanni, the species the spice trade calls Indonesian cassia or Padang cassia.²³ It’s one of the three barks sold as cassia, alongside Chinese and Vietnamese (Saigon) cassia, and all three are distinct from Ceylon cinnamon, C. verum.³ Like other cassia, it carries enough coumarin that Germany’s Federal Institute for Risk Assessment (BfR) advises eating it in moderation.⁴⁵

At a glance

What “Korintje” means

Korintje is a trade name, not a botanical one. PROSEA doesn’t use it. It lists the English names Indonesian cassia, Padang cassia and cassia vera.³ Frontier Co-op sells the same species as “Korintje” and gives Batavia cassia, Padang cassia and Indonesian cinnamon as other names for it.¹ The name is widely said to come from Kerinci, a district of Sumatra, but none of the sources we opened confirms that, so take it as the usual explanation, not a confirmed fact.

Retail labels sometimes add a grade, like Frontier’s “A Grade.”¹ We couldn’t find any public standard behind letter grades for Indonesian cassia. PROSEA says cassia grading in general is based on the type of bark (scraped or unscraped, quills, quillings, featherings or chips), its appearance and its volatile-oil content.³ You’ll see it claimed that grade C Korintje tastes bitter. We couldn’t trace that.

Flavor and the compounds behind it

Korintje smells sweet, warm and straightforwardly “cinnamon,” with less of the sharp heat of Saigon cinnamon. Katzer says Indonesian cinnamon tastes darker than Ceylon cinnamon and lacks its exciting overtones, and that in Europe Ceylon and Indonesian cinnamon are rated about the same, well above Chinese cassia.⁶

The chemistry explains a lot of the difference from Ceylon cinnamon:

PROSEA adds that among the less volatile components of cassia barks, only coumarin contributes much to flavor and aroma.³

Where it grows and how it is harvested

Kew gives the species’ native range as southern China to western and central Malesia.² PROSEA says it’s cultivated in Indonesia (Java and Sumatra) and the Philippines, with Padang in West Sumatra an important production area. Katzer says it was first cultivated in West Sumatra, where most Indonesian cinnamon is still grown.³⁶

• Altitude. In Indonesia it grows from sea level to 2,000 m. Around Padang it does best between 500 and 1,500 m.³
• Harvest. Harvest is still mainly by thinning whole trees. A stand may first be thinned in its third year for inferior bark, the first proper harvest comes two years later, and thinning continues every year for about 15 years. Bark is stripped from the lower trunk in strips of about 1 m by 5 to 10 cm.³
• Scale. FAO estimated Indonesia’s harvested area at 60,000 ha in 1998, with production of 40,000 tonnes.³ From 1991 to 1994 the United States imported about 13,000 tonnes of quills a year from Indonesia, worth about US$23 million.³ These are old figures. We didn’t find a recent official series.

We couldn’t trace the claims that Korintje is harvested at a different time of year from other cassias, or that the Dutch organized its cultivation.

Outside Indonesia. In Hawai’i, the species (listed there as Padang cassia) is naturalized in Manoa Valley and Pauoa Flats, also grows on Kaua’i and Lana’i, and has been reported spreading by birds in West Maui.⁸ The University of Hawai’i guide describes it as slowly spreading in mesic to wet forests and possibly difficult to control.⁸

How it is used

Frontier Co-op calls Korintje the traditional cinnamon for American baked goods and also suggests it for stews, soups and curries.¹ NCCIH says cassia is the most common type of cinnamon sold in North America,⁹ and PROSEA records a clear US preference for cassia over Ceylon cinnamon.³ Katzer notes that in Indonesia itself, cinnamon is used sparingly, in some sweets and in small amounts in meat stews like rendang.⁶

Korintje is the cinnamon for cinnamon rolls, apple pie, coffee cake and spiced drinks, and its milder profile makes it a forgiving default. For whole versus ground, see ground cinnamon vs. cinnamon sticks. If a dish has too much, see too much cinnamon.

Buying and quality

BfR says consumers can hardly tell Ceylon and cassia cinnamon apart once ground.¹⁰ Katzer adds that Indonesian cinnamon bark is often traded as “Ceylon cinnamon.”⁶ If coumarin matters to you, buy cinnamon labeled with its species or as “Ceylon cinnamon,” and assume unlabeled ground cinnamon is cassia. That’s practical advice, not a regulatory rule.

Storage

Keep sticks and ground cinnamon airtight, away from light and heat. We didn’t find a shelf-life figure for cinnamon from a regulator or standards body.

Safety

Coumarin

All three cassia species contain substantial coumarin, and a 2013 US study singled out C. loureiroi and C. burmannii in particular. Ceylon cinnamon had only traces.⁵ BfR gives an average of about 3,000 mg of coumarin per kg for cassia cinnamon in general.¹⁰ We didn’t find a figure specific to Korintje.

• Tolerable intake. EFSA’s tolerable daily intake is 0.1 mg of coumarin per kg of body weight.¹¹
• What that means in cinnamon. BfR calculates that a 60 kg adult hits it with about 2 g a day of cassia with average coumarin content.⁴ That’s a long-term daily figure, and individual lots vary.
• Who is at risk. NCCIH says prolonged use of cassia could be an issue for sensitive people.⁹
• Rules. There’s no EU limit for coumarin in cinnamon itself.¹⁰ Instead, EU law caps coumarin in certain foods, including traditional and seasonal bakery ware that mentions cinnamon on the label.¹²

You’ll often hear a teaspoon-a-day rule for cassia. No regulator puts it that way. The BfR figure above is the sourced one. See too much cinnamon and Ceylon vs. cassia cinnamon.

Lead

FDA public health alerts in 2024 reported lead levels from 2.03 to 7.68 ppm in specific ground cinnamon products.¹³ The products and brands are listed on our cinnamon page.

Health claims

NCCIH says research doesn’t clearly support using cinnamon for any health condition, and that it’s unclear whether cinnamon supplements help with diabetes.⁹ You’ll see claims that Korintje lowers cholesterol, lowers blood sugar as well as diabetes drugs, or treats digestive complaints, and that its flavonoids, anthocyanins or borneol have medicinal effects. None of the sources we reviewed supports them.

Substitutes and comparisons

• Cassia cinnamon and Saigon cinnamon, the other cassias
• Ceylon cinnamon and Ceylon vs. cassia cinnamon
• Saigon vs. Ceylon cinnamon
• Cinnamon substitutes
• Cinnamon, cassia buds, cloves vs. cinnamon