Rao's slow-simmered Butternut Squash Soup brings the authentic Italian taste of the iconic restaurant to the table. Rao's Butternut Squash Soup begins with the onions, garlic, carrots, and celery sautéed in olive oil to give it the authentic Italian soup a flavorful broth and adds in butternut squash, touches of cream and parmesan cheese and other spices and flavors for an authentic soup.