Porcini is a common name for several species of edible mushrooms in the genus Boletus. These mushrooms are commonly found in Europe, North America and Asia, and they grow on dead or dying trees, particularly oak, beech, pine, spruce, and birch. Porcinis have a spongy texture with a nutty flavor, making them popular for cooking and eating. They are also known as penny bun mushrooms due to their resemblance in shape and size to the British coin.