Jacques Selosse Blanc de Blancs Grand Cru SubstanceParker: 99 One of the pinnacles of the tasting with Selosse, unsurprisingly, is the NV Blanc de Blancs Grand Cru Substance, a wine with the most complex making, going through four stages of maturation: from barrels to the bottle. As always, it derives from a solera created in 1986. Originally, the wine was sourced from two parcels in Avize, but today the base wine (which eventually contributes only about 4. 8% to the final blend in the bottle) is