Cupuacu

Cupuacu is a medium-sized rainforest tree, a cousin of the cacao tree, that bears large, rough-skinned, brown, oblong fruits about twenty centimetres long, hanging from the branches. Each fruit contains around thirty to fifty seeds embedded in a creamy white, fragrant pulp that has a sharp, fruity, slightly chocolatey aroma.

The seeds resemble cacao seeds but are paler and larger. After fermentation and drying, they can be processed into a creamy-white fat called cupuacu butter and a reddish product called cupulate, a chocolate alternative. The pulp is the most important product and is sold frozen as pulp for juices, ice cream and desserts.

Cupuacu is native to the southern and eastern Amazon basin, especially the Brazilian states of Para and Maranhao, where it grows wild and in home gardens. It has been used by Indigenous peoples for centuries and is cultivated on a growing scale, including in agroforestry systems alongside other crops.

The name comes from the Tupi language: cupu and uacu, meaning big cupu, with cupu being a relative of the fruit. The botanical name Theobroma grandiflorum refers to its large flowers and shares a genus with cacao, Theobroma cacao, food of the gods.

Amazonian peoples have eaten cupuacu pulp for a long time, and the tree is a staple of home orchards. Early European observers in the Amazon described it, and it spread through the region as a cultivated fruit tree, especially after improved selections that resist disease were developed by Brazilian research institutions in the twentieth century.

In Brazil the pulp became central to juices, ice cream, mousse and sweets, and the fruit gained wider regional popularity. Cupuacu butter, with a high capacity to absorb water, attracted international cosmetic interest, and exports of pulp and butter expanded.

A notable controversy occurred in the early 2000s, when a Japanese company registered cupuacu as a trademark and patents involving derived products, which Brazilian and international groups challenged as biopiracy, since the plant belongs to Amazonian traditional knowledge. The Japanese trademark was eventually cancelled. Today cupuacu is grown in the Amazon and other tropical areas, and plays a role in agroforestry and in forest-based livelihoods.

Cupuacu pulp is used to make juices, smoothies, ice cream, mousses, jams, liqueurs and desserts, and has a sweet-sour taste often compared with a mix of pear and chocolate. The seeds are fermented, dried and roasted to produce cupulate, a chocolate-like confection. Cupuacu butter is used in cosmetic products as a moisturiser and in confectionery.

Traditionally the fruit shell is used as a container. Pulp is typically sold frozen outside the Amazon because the fruit is perishable. The seeds contain less theobromine and caffeine than cacao.

Cupuacu pulp provides vitamin C, fibre and polyphenols, and the seeds contain fats and polyphenols related to those in cacao. Laboratory research has examined antioxidant activity of cupuacu extracts, but human clinical research is minimal.

Claims about health effects from cupuacu products are mostly based on traditional use and marketing. It is best enjoyed as a flavourful tropical fruit and as a chocolate alternative, rather than as a treatment.