Difficulty: Easy - for beginners
1/2 cup balsamic vinegar
3 tablespoons brown sugar
Combine vinegar and sugar in a small saucepan, stir until sugar dissolves, and bring to a boil over medium-high heat, allowing mixture to boil rapidly for about 4-5 minutes, stirring nearly continuously. Shut off the heat and immediately pour the mixture into a heat-safe food storage container and allow it to cool in that container.