Chestnut mushrooms, scientifically known as Agrocybe aegerita, are a distinct and flavorful variety of edible mushrooms. These mushrooms are well-regarded for their robust, nutty flavor and are a popular choice in gourmet cooking.

They are characterized by their chestnut-brown to dark brown caps, which are typically convex but may flatten as they mature, revealing pale gills beneath. The stems of chestnut mushrooms are firm and often have a white ring near the top.

In culinary terms, chestnut mushrooms are prized for their rich and earthy taste, which intensifies when cooked.