Place the mushrooms in a food processor and blend them until they become a paste. Transfer the paste to a bowl and set aside.
Put a large deep-frying pan on medium to low heat, add the butter, garlic, rosemary, and mushroom paste and sauté for 2-3 minutes. Lower the heat and let all the ingredients cook until the mushrooms release all their liquid. Season with salt and pepper and stir at regular intervals.
Add the cream, mix well, remove the pan from the heat. Leave the paste to cool and serve.
Notes
Chef’s tip: This mushroom paste recipe is perfect for soups or risotto.