 The best sherry vinegars have a deep, complex flavour and enhance the flavours in soups, stews, sauces, casseroles and dressings.Vinegar from sherry has been around since sherry was first produced in and around Jerez.In the sherry bodegas wines which had undergone acetic fermentation and turned to vinegar were considered failures, however since the 1950s winemakers started to view sherry vinegar as a product in its own right and now even encourage it.