Caperberries with stems Bel Aria are a type of pickled berry that are commonly used as a garnish or accompaniment to savory dishes. They are the fruit of the caper bush and are harvested before they mature, then pickled in vinegar to give them a tangy and slightly salty taste. Caperberries with stems are larger than capers, with a round shape and a firm texture. They have a unique flavor that is both tangy and slightly sweet.