The estate lies in the heart of Gigondas where 15 hectares of vineyard grow in the shade of the Dentelles de Montmirail mountain. In addition to the estate-grown wines labeled “Château de Saint Cosme,” Louis Barruol buys grapes from contracted growers, labeling these “négociant” wines simply as “Saint Cosme.”

Côte-Rôtie is produced from 100% Sérine, an ancient and local variety of Syrah that is markedly different from modern selections. It is more oval, with lots of space in the bunch, resulting in a very aromatic wine. It is sourced from the schist soils of Le Plomb, Besset, La Viallière, and Neve climats. These hillsides are among the steepest in France with an incline as much as 55 degrees. The wine is made with whole cluster fermentation from indigenous yeasts, aged for 12 months in 30% new 228-liter barrels, and bottled without fining or filtration.