D'Oliveiras Sercial Madeira is a premium fortified wine produced by the renowned D'Oliveiras winery in the Madeira appellation. The wine is made from the Sercial grape variety, which is grown in the rugged and steep vineyards of Madeira. The winemaking process involves a unique aging process, where the wine is aged in oak barrels for several years, resulting in a complex and rich flavor profile. The wine is known for its dry and crisp style, with notes of citrus, nuts, and spices.