Argentina is best known for its bold reds from the malbec grape. But its whites, particularly from cooler climates such as Patagonia, are showing potential. In April, I tasted close to 100 of them; the best whites continue to be international varieties, particularly chardonnay and semillon. My top white from Argentina this year was from Catena Zapata. Its 2012 Chardonnay Gualtallary Valle de Uco White Bones shows the acidity and intensity of a top grand Chablis, along with all the minerality one could hope for in a white of the genre—i rate it 98 points. Chardonnay is often excessively creamy and oaky in Argentina. However, winemakers like Catena’s Alejandro Vigil and Zuccardi’s Sebastian Zuccardi are cutting back on malolactic fermentations and using wood sensibly, looking for an expression of their vineyards with a Burgundian sense of style. They are also planting in higher, cooler altitudes in limestone-rich soils to attain freshness and typicity. The resulting wines deliver intense mineral expressions of a world-class chardonnay that deserves attention.