A single acre of Sauvignon Blanc at 850 feet in the Vaca Mountains, farmed by a family that has been on this Napa ranch since 1955. Sunninghill is the outlier in Snowden’s lineup, a mountain white in Cabernet country, and it is made with the same hands-off logic Diana Snowden Seysses brings back from her other job at Burgundy’s Domaine Dujac. Expect pure citrus and orchard fruit wrapped around a core of wet stone, not the loud grassy stuff. It opens what the family calls their dinner survival kit, and it earns the slot.