Balsamic reduction can be made quickly at home with just balsamic vinegar and brown sugar. How to make: Combine 2 cups balsamic vinegar and ½ cup brown sugar in a small saucepan. Simmer over medium-low heat, stirring occasionally, until the vinegar has thickened and reduced in half, about 8 to 10 minutes. Remove from heat and allow to cool completely before using. Glaze will thicken as it cools.