Red wine vinegar is a type of vinegar that is made from red wine that has been allowed to ferment. Red wine vinegar is a type of vinegar that is made from red wine that has been allowed to ferment. The wine is first exposed to oxygen, which causes the alcohol in the wine to be converted into acetic acid, giving the vinegar its characteristic tangy flavor. Red wine vinegar has a deep, rich color and a bold, robust flavor that is both tangy and slightly sweet. It is commonly used as a condiment, salad dressing, marinade, or in cooking to add flavor and acidity to a wide variety of dishes. It pairs well with meats, vegetables, and salads, and can be used in sauces, stews, and soups to add complexity to the flavor profile.