Blanc de Blancs Champagne is derived from the Chardonnay grape only. These are, on release, the lightest and most graceful wines of the lot, but properly aged vintage example take on a gorgeous toasty richness that quite belies the lightness argument. Some favourite styles, if you're buying are Salon,Ruinart,Nicolas Feuillatte,Billecart-Salmon, Drappier,Taittinger Comtes de Champagne, Krug Clos de Mesnil.