capers plus a bit of caper liquid
Capers are low in calories but contain vitamin K and small amounts of minerals including iron and copper; they are high in sodium due to their preservation method. The brine adds additional salt content.
About
Capers are the pickled, unopened flower buds of Capparis spinosa, a prickly shrub native to the Mediterranean region and parts of Asia. The buds are harvested before bloom, dried briefly, and then preserved in a brine of salt and vinegar, which imparts their characteristic briny, piquant flavor. The caper plant thrives in arid environments, and different geographical regions produce capers of varying sizes; nonpareils are the smallest (8mm or less), while surfines and capucines are progressively larger. The flavor is intensely salty and slightly acidic, with subtle herbaceous notes.
The caper liquid (the brine in which they're packed) contains salt, vinegar, and dissolved compounds from the capers themselves, making it a concentrated condiment in its own right. This liquid is used both as a preservative and as a flavoring agent in its own right, adding saline and acidic notes to dishes without additional whole capers.
Culinary Uses
Capers are essential to Mediterranean, particularly Italian and Spanish, cooking, where they function as both a flavor accent and a textural element. They feature prominently in classic dishes such as puttanesca, tapenade, smoked salmon preparations, and salads. The caper liquid serves multiple functions: it can dress vegetables, add complexity to vinaigrettes, or season sauces. Both the buds and their brine are used to cut through rich dishes—their acidity and saltiness complement fatty fish, particularly anchovies and tuna, and balance cream-based sauces. They are also employed in relishes, pickled preparations, and as a garnish for charcuterie.