Including fully 29% Sémillon, the 2021 Cos d'Estournel Blanc is a terrific effort from holdings in the northern Médoc. Offering up aromas of confit citrus, crisp orchard fruit, lime zest, pastry cream and freshly braked bread, it's medium to full-bodied, layered and incisive, with chalky structuring dry extract and a penetrating finish. There's no question that it's one of the Médoc's most interesting white wines.