Makes: ¼ cup
Time: About 20 minutes
Inexpensive balsamic vinegar is both sweet (it usually contains sugar) and sour, so it naturally goes well with both savory and sweet foods. And this simple reduction, which begins with inexpensive balsamic vinegar, is a nice substitute for the high-priced stuff. Just be sure to start with a clean-tasting balsamic vinegar, because reducing it will concentrate both good and bad aspects.
Put the vinegar in a small nonreactive pan over medium-low heat. Bring to a boil, then immediately lower the heat so it bubbles gently. Reduce at a low simmer to ¼ cup, about 20 minutes; it should be thickened and syrupy. It will thicken a little more as it cools. Serve warm or let cool, then store in an airtight container indefinitely.
For more flavor, slip any of the following ingredients into the pan while the vinegar is reducing. When you’re done, strain the syrup or fish out the solids with a slotted spoon.