Balsamic-aged vinegar is dark, slightly sweet, rich in flavor, and thick in texture. It is  used to enhance salad dressings, marinades, and sauces. It can be  drizzled over strawberries, stirred into a risotto, or tossed with  Brussels sprouts or red onions to allow its sugars to caramelize in the  oven. But what is barrel-aged balsamic vinegar, and how is it produced?  What makes balsamic vinegar so costly than others? Let’s find out the  answer to such a query!