Transform ordinary balsamic vinegar into thicker, slightly sweet reduced balsamic to make a best-ever salad dressing.
Reduction transforms inexpensive balsamic vinegar into an extraordinary sauce. At a restaurant supply store like Smart and Final, 5 liters of Italian balsamic vinegar sells for under $20.00. 5 liters will make 40 ounces of reduced balsamic, enough for a hundred servings.
For an individual serving, pour 1/4 cup of vinegar into a small saucepan and heat over a slow flame. That will take 10-15 minutes and make about a tablespoon. Let cool and mix with olive oil to use as a salad dressing to serve 4.
5 liters of vinegar will take 8-10 hours to reduce to 20% of the original volume. Use a small spoon to taste the vinegar. When thickened, the balsamic has a slightly sweet flavor. Roughly speaking, 5 liters will make 40 ounces of reduced balsamic.