Mazuelo is a red grape variety primarily grown in Spain and Portugal. It is known for producing wines with deep color, moderate acidity, and robust tannins. Often used in blends, Mazuelo adds structure and complexity to the final product. In Spain, Mazuelo is commonly found in the Rioja and Priorat regions, where it is often blended with other varieties like Tempranillo and Garnacha. The grape is also known as Carignan in France and is appreciated for its ability to thrive in warm climates, resulting in rich and flavorful wines.