From holdings in the north of the Médoc and incorporating an increasing percentage of Sémillon, the 2019 Cos d'Estournel Blanc offers up aromas of pear, confit citrus, lemon grass and pastry cream, followed by a full-bodied, ample and fleshy palate that's rich and enveloping, with lively acids and a long, saline finish. This is a fine effort that could embarrass plenty of Pessac-Léognan whites.