Cupuacu (also spelled Cupuassu or Copoasu), is a fruiting tree that grows in the rain forests of Brazil and it is farmed in very few places in the Amazon river basin and Bahia.

The fruits are relatively large, about melon-sized with a husk-covered coconut-like shell. Inside the cupuacu fruit there are large seeds and creamy white pulp. It is the pulp fruit that is so sought after. As a species, the cupuacu plant (Theobroma grandiflorum) is a sister plant to cacao, and the flavor is often compared to that of chocolate.