Burnt sugar is a rich and flavorful syrup made by caramelizing sugar. It has a deep amber color and a slightly bitter taste, adding a complex sweetness to dishes. Burnt sugar is commonly used in desserts like flan, custards, and caramel sauces. It can also be used to enhance the flavor of savory dishes like stews and glazes for meats. The process of making burnt sugar involves heating sugar until it melts and turns dark brown. It is important to be cautious while making burnt sugar as it can easily burn and become bitter.