Chardonnay is a major white grape , used in the Vin de Pays d 'Oc and the sparkling Crémant de Limoux . Others include Chenin blanc and Mauzac , which is also the principal grape in the sparkling Blanquette de Limoux . The sweet fortified wines of the Muscat de Frontignan and Muscat de St @-@ Jean Minervois regions are made with the Muscat Blanc à Petits Grains grapes . In the Muscat de Rivesaltes AOC , fortified wines are made from Muscat of Alexandria grapes .