To make a balsamic reduction or balsamic glaze, you will need 2 cups of Balsamic Vinegar and 1/2 cup Brown Sugar. Add balsamic vinegar and sugar in a  pan. Heat over medium heat and bring the mixture to a gentle boil. Simmer the heat to medium-low and cook until the mixture is reduced to half and starts to coat the back of the spoon. It will take 15-20 minutes for the mixture to cook to the right consistency. Keep stirring at regular intervals while cooking. Remove the pan from heat and let the glaze cool down. Store in a glass jar and use as required. Check out my detailed post on how to make Balsamic Reduction here.