Pour 1 c. Wild Blueberry Balsamic Vinegar into a small saucepan over medium heat.

Bring it to a boil, then reduce heat to simmer.

Simmer until it is reduced by half (for a thinner reduction; reduce more for thicker reduction), stirring occasionally. Do not rush the process by increasing the heat, which will cause the balsamic to harden.

Cool, then store in airtight container in refrigerator.