Dark brown sugar is a type of sweetener that is widely used in baking, cooking, and making desserts. It is made from granulated sugar and molasses, which gives it a rich caramel-like flavor. In some recipes, you may find that dark brown sugar is referred to as muscovado sugar, which is a type of unrefined brown sugar that is darker and stickier than regular dark brown sugar. Other synonyms for dark brown sugar include demerara sugar, which is a type of granulated golden brown sugar with large crystals, and turbinado sugar, which is essentially raw sugar that has been partially refined. These different types of brown sugar may work better in certain recipes depending on the desired flavor and texture.