Most nuts hide inside a fruit, pod, or shell, but cashews do something surprisingly dramatic: they grow on the outside of a fruit-like structure called the cashew apple. If you’ve only ever seen cashews roasted and salted in a bowl, the whole plant can look almost unbelievable.
On the cashew tree, a bright red, yellow, or orange cashew apple develops first. Hanging from the bottom of it is a curved, kidney-shaped shell. Inside that shell is the cashew seed we eat. So the “nut” is not tucked safely inside the apple. It dangles underneath it, exposed to the open air.
Technically, the cashew apple is not a true fruit in the botanical sense. It is a swollen stem, while the true fruit is the shell that contains the cashew seed. Still, in everyday language, people often describe it as a fruit because it looks juicy, colorful, and edible. In many places where cashew trees grow, the cashew apple is eaten fresh or made into juice, jams, syrups, and alcoholic drinks.
Another surprising detail is that each cashew apple produces only one cashew. That means every handful of cashews represents a lot of harvesting and processing. The outer shell also contains a harsh, irritating oil related to poison ivy, so raw cashews must be carefully processed before they are safe to eat. This is why you rarely, if ever, see cashews sold truly raw in their shells.
The next time you snack on cashews, it’s worth picturing where they came from: not from a hidden cluster inside a fruit, but from a single seed hanging beneath a glossy cashew apple. It’s one of those everyday foods with a backstory that feels almost too strange to be real.