Chestnut MushroomsChestnut Mushrooms are incredibly intriguing and equally delicious! They have a chestnut brown or reddish brown cap, with unusual white protrusions called fibrils. Chestnut mushrooms have a stronger and more pronounced flavor compared to white button mushrooms, with a slightly nutty, earthy, and meaty taste. Use them in any cooked dish as a flavorsome replacement for button mushrooms.