Brown sugar is a type of sugar that contains molasses, giving it a distinctive brown color and a rich flavor. It is commonly used in baking and cooking, adding moisture and a hint of caramel taste to recipes. Brown sugar comes in two main varieties: light and dark, with dark brown sugar containing more molasses. This sweetener is often used in desserts like cookies, cakes, and sauces. It can also be used in savory dishes to balance flavors. Brown sugar is available in granulated form and can be packed tightly in measuring cups for accurate measurements in recipes.