Dipteryx odorata, commonly known as cumaru, kumaru, Brazillian teak, or the tonka bean tree, is a large tropical flowering tree in the family Fabaceae. Native to the Amazon basin and the Guiana Shield in South America, the tree is a vital component of the rainforest canopy, often reaching heights of up to 30 meters. The genus name Dipteryx is derived from the Greek dis ("two") and pteryx ("wing"), referring to the two wing-like appendages on the fruit's calyx. The species epithet odorata refers to the powerful, sweet, and highly aromatic nature of its seeds. Historically, the tonka bean has served as a cornerstone of Amazonian ethnobotany, where it was traditionally used in folk medicine to treat respiratory and digestive ailments, and later became a sought-after global commodity in the perfume and flavoring industries.

The tree is an imposing figure in the forest, characterized by its smooth, grey bark, glossy compound leaves, and dense, wide-spreading crown. It produces small, pea-like flowers that are typically pink or purple. The fruit itself is an oblong, single-seeded, fleshy drupe that resembles a small mango in shape. When the fruit matures and falls to the forest floor, it is harvested, and the hard, black, wrinkled seeds—the "tonka beans"—are extracted. These beans undergo a traditional fermentation and drying process, often soaked in rum or high-proof alcohol, which causes them to develop a crystalline coating of coumarin on their surface. This process is essential for transforming the raw, potentially bitter bean into its final, highly fragrant state.

As a food source, the tonka bean is a legendary aromatic ingredient in fine pastry and high-end gastronomy. Its flavor is remarkably complex and intense, often described as a heady blend of vanilla, almond, clove, cinnamon, and freshly mown hay. Because of its extreme potency, it is never eaten whole; instead, a tiny amount is finely grated or shaved into creams, custards, ice creams, chocolate ganache, and cocktails, much like a nutmeg. In modern French and international pastry, it has become a staple "secret ingredient" used to enhance chocolate or fruit-based desserts, though its culinary use is restricted in several countries—including the United States—due to its high natural concentration of coumarin, which can be toxic if consumed in large, concentrated quantities.

Nutritionally and biochemically, the tonka bean is not consumed for caloric density, but rather for its dense concentration of specialized bioactive compounds. The defining component is coumarin (1,2-benzopyrone), a benzopyrone compound that gives the bean its iconic "vanilla-hay" scent. Coumarin is a potent phytochemical that has been studied extensively for its pharmacological properties, including anticoagulant, anti-edematous, and anti-inflammatory activities. Beyond coumarin, the seeds contain a variety of flavonoids, phenolic acids, and unique fixed oils, which contribute to their traditional use as a stimulant, cardiac tonic, and antispasmodic in indigenous medical systems. Modern research into the beans focuses on the antioxidant capacity of these secondary metabolites and their potential for use in pharmaceutical applications.