Balsamic glaze can be found in the glaze or vinegar section of the grocery store. To make balsamic reduction at home, combine 1/2 cup balsamic vinegar and 2 teaspoons sugar in 1-quart saucepan. Cook over medium heat until mixture comes to a boil. Reduce heat to medium-low; cook until liquid is reduced by 1/4. Measure desired amount for recipe. Store refrigerated up to 1 week.