Balsamic Reduction

• 1 cup balsamic vinegar
• 1 to 2 tablespoons brown sugar (optional)
• 1

Bring the vinegar to a boil in a small saucepan over medium heat. Turn the heat to low and let it simmer until it is reduced to ½ cup, about 10 minutes, then stir in the sugar, if using. Simmer until the reduction becomes syrupy and coats the back of a wooden spoon, about 5 minutes longer. You should end up with between ⅓ and ½ cup. For richer flavor, stir in the optional olive oil (or, if usin