verjuice is a product obtained by pressing unripe green grapes. it has an acidic, slightly fruity flavour, which can be used as a substitute for vinegar in sauces and dressings. it can also be used to marinate meat or fish, or to add flavour to soups and vegetable purées. Verjuice is produced in many regions of the world, each with its own unique version depending on the green grapes used and the production methods. Verjuice is usually eaten fresh, but it can also be frozen for longer storage.