Blanc de Blancs any white wine made from white grapes only. Not an indication of quality but should be of style. Blanc de Blancs is pure Chardonnay.The Sparkling Blanc de Blancs is from the Chardonnay grape only. These are, on release, the lightest and most graceful wines of the lot,but properly aged vintage examples take on a toasty richness that quite belies the lightness argument.