The smallest stage of the Agaricus bisporus mushrooms, the button is usually around 5cm in width, and as neat and small as its namesake. The original Paris mushroom or Paris white, buttons grown in professional facilities are picked before they can become bigger and end up as closed cup or flat mushrooms. Widely popular in the western world, button mushrooms are perfect baked in garlic butter in a traditional English breakfast or sliced on a pizza. Button mushrooms are especially useful if you can’t find one of the smaller wild mushrooms in the shops, and provide a good alternative to mushrooms like pied bleu.