Capers come from Capparis spinosa, a prickly, perennial plant which grows in the Mediterranean region and some parts of Asia. The unripened flower buds of the plant are usually prepared for consumption by first being dried in the sun, then pickled in vinegar, brine, wine, or salt. This process brings out their tangy lemony flavor, which is very similar to green olives. Capers have been used in food since 3000 BC.