Which ingredient is often used in BBQ rubs for its sweet flavor?

Brown sugar is commonly used in BBQ rubs primarily for its sweet flavor, which balances the savory and spicy elements of the rub. When applied to meats, the sugar caramelizes during cooking, creating a beautiful glaze and enhancing the overall taste profile. This sweetness also helps to create a subtle char on the surface of the meat, adding to the texture and flavor.

In contrast, while cayenne pepper contributes heat, ground mustard offers a tangy flavor, and garlic powder adds a savory, aromatic quality, none of these ingredients provide the same level of sweetness that brown sugar does in BBQ rubs. The unique ability of brown sugar to not only sweeten but also contribute to the Maillard reaction during the cooking process makes it a preferred ingredient among pitmasters and home cooks alike.