Cashew Apple

The cashew apple is a tropical pseudofruit that develops from the flower receptacle of the cashew tree (Anacardium occidentale), making it technically an accessory fruit rather than a true fruit. The cashew nut itself is the botanical true fruit—a hard-shelled seed that develops at the base of the apple. Despite the apple being far larger and more voluminous than the nut, it has historically been treated as a byproduct because the nut commands higher market value and the apple's extreme perishability makes long-distance transport impractical. Nearly all commercial cashew production discards or underutilizes the apple; estimates suggest less than 5 percent is processed into products, representing significant food waste in producing regions where the fruit is abundantly available.

What makes the cashew apple remarkable is its extraordinary vitamin C content—approximately 261 mg per 100 g of juice, roughly five to ten times more than orange juice, making it one of the most vitamin C-dense tropical fruits. The flavor is sweet with a distinctive spicy note, but the skin and outer flesh contain high concentrations of tannins that produce an intensely astringent, puckering sensation. This astringency is what makes the fruit unsuitable for eating out of hand like a regular apple; it must be processed—typically juiced, strained, and sweetened—to be palatable. The pear-shaped or onion-shaped fruit typically measures 5 to 11 cm and ranges from yellow to reddish-orange when ripe, depending on the variety.

Handle with care: the cashew apple skin contains urushiol, the same compound found in poison ivy, which can cause contact dermatitis in susceptible individuals. Always wash hands thoroughly after handling the fruit, and consider wearing gloves when processing large quantities. The fruit begins deteriorating within 24 to 48 hours after harvest and can start fermenting within hours at room temperature, so immediate processing is essential for any culinary use.