Get ready! Start by measuring out the balsamic vinegar, brown sugar, garlic powder, and black pepper. Having everything on hand will make the process much smoother.

In a medium saucepan, pour in the balsamic vinegar first. Next, add the brown sugar, garlic powder, and a pinch of black pepper. Stir the mixture well to ensure that the sugar and spices are evenly distributed.

Place the saucepan over medium heat. As the mixture heats, stir it constantly. You want to make sure the sugar fully dissolves. Once it reaches a gentle boil, you'll see little bubbles starting to form.

Once boiling, it's time to lower the heat. Reduce the stovetop to low. Allow the sauce to simmer gently. This is where the magic happens! Keep an eye on it and give it a stir occasionally. You’ll want to simmer until the mixture reduces by half and can coat the back of a spoon—a process that generally takes around 20 minutes.

After 20 minutes, remove the saucepan from heat. Be cautious: this glaze can be hot! Allow it to cool down before transferring it to a jar. The glaze will thicken further as it cools.

Once cooled, pour the balsamic glaze into a jar with a tight-fitting lid. Seal it up and store it in the refrigerator where it can last for several weeks.