Chestnut mushrooms, also known as cremini mushrooms or brown mushrooms, are a variety of edible mushroom that are popular in cooking due to their rich, earthy flavor. They are closely related to the white button mushroom but have a firmer texture and deeper flavor profile. Chestnut mushrooms are commonly used in a wide range of dishes, including soups, stir-fries, pasta dishes, and sauces.

When selecting chestnut mushrooms, look for ones that are firm, with a smooth surface and a rich brown color. Avoid mushrooms that are delicious mushroom recipes  slimy or have dark spots.

In terms of nutrition, chestnut mushrooms are low in calories but rich in essential nutrients such as protein, fiber, vitamins (especially B vitamins like riboflavin, niacin, and pantothenic acid), and minerals (such as potassium, copper, and selenium).

They're versatile in cooking, adding depth and flavor to many dishes. You can sauté them with garlic and herbs as a side dish, add them to omelets or frittatas, or include them in hearty stews and casseroles. They also make a great meat substitute in vegetarian dishes due to their meaty texture.