Mushroom and truffle soup is a luxurious and elegant dish that combines the earthy flavors of mushrooms with the intense aroma of truffles. This recipe typically uses ingredients like cremini mushrooms, onions, garlic, thyme, truffle oil, and cream. To make this soup, start by sautéing onions, garlic, and thyme in butter until fragrant. Then, add sliced cremini mushrooms and cook until they release their moisture. Next, add vegetable or chicken broth and simmer until the mushrooms are tender. Finally, add a drizzle of truffle oil and cream, and stir until the soup becomes creamy. Serve this mushroom and truffle soup hot with a sprinkle of fresh thyme leaves. It's a sophisticated and indulgent dish that is perfect for special occasions.