Capers are a condiment, usually pickled, that are made from the immature flower buds of the caper bush (Capparis spinosa), which grows in Mediterranean regions. Dark green buds which are sun-dried and then packed in a vinegar brine.
Sometimes capers are cured by salting rather than pickling. Cooking with capers is a matter of balancing their tangy, briny, pickly flavor against some sort of smooth, buttery or velvety flavors and textures. They're also widely used in sauce making, in salads, as a condiment or as a flavorful garnish. Capers are frequently used in conjunction withlemons. They pair well with salmon, especially smoked salmon.