Worcestershire sauce is a fermented condiment made from a base of vinegar and flavored with anchovies, molasses, tamarind, onion, garlic, and other seasonings. The flavor is savory and sweet with a distinct tang provided by the vinegar. The most common form of Worcestershire sauce is not appropriate for a vegetarian or vegan diet and cannot be used in a kosher meal that includes meat. Depending on the brand, it may or may not be gluten-free.
