Soup flavoring can be a great way to add flavor and depth to a soup. The four crossword solutions for soup flavoring are DILL (4 letters), miso (4 letters), ONION (5 letters), and HERB (4 letters). DILL is an aromatic HERB with a mild flavor that is often used in soups, salads, and sauces. Miso is a traditional Japanese seasoning made from fermented soybeans and salt. ONION is a vegetable that adds a sweet and savory flavor to soups. Herbs are fragrant plants that can be used to add flavor to soups.