Tonka Bean

What it is

Tonka beans are the fragrant seeds of Dipteryx odorata, a South American tree. Kew specifically notes the species as an important source of coumarin, whose fragrance contributes strongly to tonka’s identity.

The beans develop their characteristic perfumery value through drying and curing rather than functioning simply as a fresh seed smell.

What to notice

Tonka can suggest:

• freshly cut hay
• vanilla
• almond or marzipan
• warm tobacco
• soft spice
• caramel-like sweetness
• dry balsamic warmth

That combination makes tonka feel simultaneously gourmand and aromatic.

Tonka and coumarin

Coumarin is strongly associated with tonka bean but is also found in other natural materials and is widely available as a fragrance ingredient in its own right.

A fragrance can therefore smell distinctly tonka-like through coumarin or an accord without containing tonka-bean extract.

Role in perfumery

Tonka is important in amber, tobacco, gourmand and especially fougère structures, where coumarinic hay sweetness can sit beneath lavender and aromatic materials.

The archive should distinguish natural tonka material from a generic coumarin note when the source provides that level of detail.