Celery Root Soup is my new favorite soup recipe. This creamy bisque-like soup is very flavorful and very easy to make with just a few ingredients. Is celery and celery root the same thing? We’ll let you know. Celery root has a slightly sweet taste with a mild celery flavor. Top this soup with a walnut and parsley gremolata for a crunchy, nutty and herby ending note. Did we mention it simmers with a big chunk of parmesan cheese?