Don Cayo Black Extra Anejo Tequila is a premium tequila that has been aged for an extended period of time, resulting in a deep and complex flavor profile. The "Black" in the name may refer to the dark color of the tequila, which is a result of the prolonged aging in oak barrels. This extra-long aging process imparts rich and nuanced flavors to the tequila, with notes of oak, spice, chocolate, and agave.