Casar de Burbia produces Mencía-based wines from Castilla y León, Spain's expansive northern region. The winery's portfolio centers on this indigenous dark-skinned variety, which thrives in the region's continental climate and yields wines of structure and depth. El Castañal Grano A Grano Mencía stands as the flagship expression, earning recognition from Wine Spectator, Wine Advocate, Decanter, and Wine Enthusiast. The Tebaida line—both the standard bottling and the Nemesio reserve—further demonstrates the winery's focus on Mencía's potential, with each wine reflecting the grape's characteristic mineral character and dark fruit profile. These offerings have been assessed by major international critics, positioning the winery within Spain's broader conversation around Mencía as a serious alternative to more widely planted varieties.