A poppy seed is a tiny seed shaped like a kidney. It is harvested from the opium poppy plant and is classified as an oilseed, which means its oil is extracted by pressure and used almost as commonly as its seeds. The seed is commonly used as a cooking ingredient in baked goods, as a garnish or part of a spice mixture. The seeds, which range in colour from white to blue, purple and black, are used in both sweet and savoury recipes, either whole or ground. The poppy seed is also used by various cultures as a garnish, condiment and spice.