Initial analysis signifies that black truffles could even provide all nine important amino acids, making this fungus a complete source of protein. Pro TIP: After making your truffle butter, cowl tightly with plastic wrap. Truffle oil can also be a extra reasonably priced different to black truffles. Truffle oil is the most commonly used and is generally tossed on dry pasta earlier than including to the sauce, added on to the cheese sauce or drizzled on top after it is assembled. Remove rice from flame and stir in chilled butter and a generous 1/2 cup of parmesan cheese till they're fully integrated into the dish.