Tonka bean: Flavor, Cooking Use and Health Facts
Tonka bean is sweet, warm and vanilla-like and is grated into desserts; no health benefit has been shown, and in the US it is not allowed in food because of its coumarin.
Content last updated . This page has not been medically reviewed.
In the kitchen at a glance
Flavor:SweetWarm / woodyFloral
Aroma: Sweet and hay-like, with notes of vanilla, almond, cherry and a little clove.
Used in: desserts, baking, tea and drinks
Usual amount in food: Very little; one home recipe uses a quarter of a bean, finely grated, for about 40 cookies. We found no official amount, and USDA SR Legacy has no entry.
What it is
Tonka bean is the seed of Dipteryx odorata, a tall tree in the pea family that is native to northern South America. [3] Each fruit holds one black, wrinkled seed. After the hard shell is removed, the seeds are dried for a few days. [3] The tree is also called cumaru. [2] The seeds are not related to vanilla pods, but they are used in a similar way.Flavor and aroma
Tonka bean smells like sweet woodruff or fresh hay. Writers describe the taste as a mix of vanilla, almond, clove and cinnamon. [3][8] One perfume writer adds smoky cherry and sugared almond. [9] Coumarin causes the typical smell, and on its own it tastes bitter. [3] The white dust you may see on a bean is coumarin crystals. [9] It pairs well with almond, vanilla, cherry, chocolate and cinnamon. [9]How it is used in cooking
The bean is hard, so cooks grate it with a fine rasp or a microplane, or warm it in milk or cream and then remove it. [9][8]- Desserts: custards, ice cream, puddings, cakes, cookies and chocolate. [8][9]
- Savory dishes: one retailer says it also suits stews, sauces and marinades. [8]
- Drinks: hot chocolate, other drinks and cocktails. [8][9]
- France: the bean is used in desserts, stews and perfumes. [3]
A vanilla pod is not a straight swap, because the flavor differs. [3] We found no cooking source we could open that gives a tested substitute, so we give no rule. Grate it at the last moment, and add a little at a time, because strong flavor is hard to take out. [9]
Normal food amounts
| Measure | Grams | Source |
|---|---|---|
| 1 teaspoon, 1 tablespoon | Not available | USDA SR Legacy has no entry for tonka bean |
| Typical recipe amount | About one quarter of a bean for 40 cookies | One perfume writer's recipe [9] |
USDA SR Legacy has no entry for this spice, so we show no nutrient numbers. A pinch of grated bean adds flavor and almost nothing else. We found no source that gives a usual or official recipe amount.
Buying, storing and preparing
- Forms: whole dried beans are the usual form. Tonka extract is also made. [2][1]
- Where it can be bought: the US ban means American chefs often get beans through irregular channels. They are legal and used in Canada and Europe. [2]
- Mix-ups: in 2008 the FDA warned that some cheap "Mexican vanilla" sold to tourists contained coumarin from tonka bean. It advised buying vanilla only if the label says "vanilla bean". [7]
- Storing: the sources we opened give no shelf life or storage rules, so we give none.
Health: what research says
Using a little grated bean in a dessert is very different from taking concentrated coumarin or tonka extract.Food amounts vs supplements
| In normal cooking | In supplements and extracts | |
|---|---|---|
| Typical amount | A fraction of a bean per recipe; no official amount found [9] | Tonka supplements: no official amount found |
| What studies mostly used | No study of tonka bean as a food was found | Trials used pure coumarin as a medicine, not tonka bean, at 8 to 7,000 mg a day [6] |
| What we can say about benefit | No health benefit has been shown | Not shown for tonka bean |
| Main safety limit | Coumarin; US law bars it in food [1] | Liver enzyme rises in a small share of people taking coumarin at 90 mg a day or more [6] |
The seeds typically contain 1 to 3% coumarin and rarely up to 10%. [3][5] Those figures are for the bean, not for a pinch of it.
What the evidence shows
| Use | What the sources found | Strength of evidence | Form and population |
|---|---|---|---|
| Any health benefit of tonka bean | We found no human trial of tonka bean | Insufficient evidence | Not applicable |
| Liver effects of coumarin | A 2022 review found liver enzyme rises in a small share of patients taking coumarin as a drug, usually reversing after stopping; it reports no liver failure and no toxicity below 25 mg a day. [6] | Established, for the drug | Pure coumarin at drug doses, adults |
| Lasting safe intake | EFSA set a tolerable daily intake of 0.1 mg per kg of body weight; BfR confirmed it in 2012. [5][4] | Established (regulatory value) | General population |
| Animal liver harm | High coumarin caused liver damage in dogs and rats, which led to the US food ban. [5] | Lab or animal only | Dogs and rats |
| Blood thinning | One review says coumarin itself has no anticoagulant effect, unlike warfarin. [6] The FDA warned people on warfarin about coumarin in fake vanilla. [7] | Mixed (sources disagree) | Pure coumarin; fake vanilla |
There is no herb guide for tonka bean on this site. For the same plant compound in another spice, see Cinnamon.
Official statements
- FDA (US): under 21 CFR 189.130, food with added coumarin, or coumarin as part of tonka beans or extract, is adulterated. The rule rests on a 1954 order. [1]
- EFSA (EU) and BfR (Germany): tolerable daily intake 0.1 mg per kg of body weight. We read these through [4] and [5], not the EFSA opinion itself. [4][5]
- EU: plant parts that contain coumarin may be used for flavoring, but isolated coumarin may not be added to food. [4][5]
- Canada: one source says adding coumarin to food is illegal but eating it through tonka bean is not. [2]
Related pages
Health connections for Tonka bean
What research links to this spice, and how strong the evidence is. Most studies use concentrated extracts or doses far above what you eat; each card says which.
Health benefits of tonka bean
Not enough evidenceWe found no human trial of tonka bean as a food or supplement, so no health benefit is shown.
Supplements: No benefit shown for food amounts or supplements.
Connected topics
Open a group to see how each topic connects and how strong the evidence is.
Body systems (2)
- Hepatic / Liver SystemDocumented risk
Coumarin in tonka bean caused liver damage in animals and enzyme rises in a small share of people taking it as a drug; this is not shown for food amounts.
- Liver & DetoxDocumented risk
Same liver caution as above, tied to coumarin dose.
Body parts (1)
- LiverDocumented risk
Coumarin liver effects in animals and in a small subgroup taking it as a drug; usually reversed after stopping.
Documented risks and interactions (5)
- Coumarin and the liver. Coumarin harmed the liver of dogs and rats at high doses, and a small share of people taking it as a drug had liver enzyme rises that usually reversed.
- US ban on tonka bean in food. In the US, food containing added coumarin or tonka beans or extract is legally adulterated (21 CFR 189.130).
- Tolerable daily intake of coumarin. EFSA set 0.1 mg per kg body weight per day and BfR confirmed it in 2012; children reach it more easily than adults.
- Blood thinners and coumarin in fake vanilla. FDA warned in 2008 that coumarin is related to warfarin and may raise bleeding risk; a 2022 review says coumarin itself has no anticoagulant effect.
- Fake vanilla containing tonka bean. FDA warned that some cheap Mexican vanilla contained coumarin from tonka bean and advised buying only products labelled vanilla bean.
Frequently asked questions
Is tonka bean sweet?
Yes. It tastes sweet and warm, like vanilla with almond and clove notes. [3][8]
How much is normal?
We found no official amount. One recipe uses a quarter of a bean for about 40 cookies. [9]
Is it legal?
Not in US food, where the FDA calls it adulterated. [1] It is used in Canada and Europe. [2]
Is it safe in pregnancy?
The sources we read do not describe this. Ask your midwife or doctor.
Can I take it with medicines?
The FDA warned people on warfarin about coumarin in fake vanilla. [7] A 2022 review says coumarin itself does not thin the blood. [6] Ask a pharmacist.
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Safety note at a glance
Safety in more detail
- Medicines: the FDA, as reported by HealthDay in 2008, said coumarin is related to warfarin and may raise bleeding risk for people on blood thinners. [7] The 2022 review says coumarin has no anticoagulant effect of its own. [6] We found no tonka bean case report in the sources we opened, so ask a pharmacist if you take warfarin.
- Pregnancy: the sources we read do not describe tonka bean in pregnancy. Ask your midwife or doctor.
- Breastfeeding: the sources we read do not describe this.
- Children: BfR says children reach the coumarin limit more easily than adults. [4][5]
- Allergy: the sources we read do not describe tonka bean allergy.
- Liver and kidney: coumarin caused liver damage in animals and enzyme rises in a small share of people taking it as a drug. [5][6] BfR says it found no such liver damage from eating cinnamon. [4] We found nothing on kidneys.
- Surgery: the sources we read do not describe a surgery warning.
- Quality and contamination: tonka bean has been sold inside fake "vanilla". [7]
- Amounts that cause trouble: BfR's limit of 0.1 mg per kg means 6 mg a day for a 60 kg adult, and going over it briefly is not seen as a risk. [4] At 1 to 3% coumarin, one bean of a few grams could hold tens of milligrams. That is our rough arithmetic, not an official figure, and bean sizes vary. One writer says at least 30 beans would be needed to reach toxic levels, citing a magazine we did not open. [9]
References
- Cornell Legal Information Institute — 21 CFR 189.130, Coumarin. https://www.law.cornell.edu/cfr/text/21/189.130 (accessed 2026-10-24)
- McGill Office for Science and Society — article on tonka beans. https://www.mcgill.ca/oss/node/2565 (accessed 2026-10-24)
- Wikipedia — Dipteryx odorata (relies on Duke and duCellier, CRC Handbook of Alternative Cash Crops). https://en.wikipedia.org/wiki/Dipteryx_odorata (accessed 2026-10-24)
- BfR (Germany) — FAQ on coumarin in cinnamon and other foods, 2012. https://www.bfr.bund.de/en/frequentlyaskedquestionsoncoumarinincinnamonandother_foods-8487.html (accessed 2026-10-24)
- Lončar M et al. — Coumarins in Food and Methods of Their Determination. Foods 2020;9(5):645. https://pmc.ncbi.nlm.nih.gov/articles/PMC7278589 (accessed 2026-10-24)
- Coumarin-Induced Hepatotoxicity: A Narrative Review. Molecules 2022. https://pmc.ncbi.nlm.nih.gov/articles/PMC9783661/ (accessed 2026-10-24)
- HealthDay — FDA Warns of Dangers of Mexican Vanilla, 31 October 2008. https://www.healthday.com/health-news/public-health/fda-warns-of-dangers-of-mexican-vanilla-620868.html (accessed 2026-10-24)
- Meilleur du Chef — Tonka bean (retailer page). https://www.meilleurduchef.com/en/shop/food/sweet-groceries/tonka-bean.html (accessed 2026-10-24)
- Bois de Jasmin — tonka bean article (perfume writer). https://boisdejasmin.com/?p=13796 (accessed 2026-10-24)