The 2006 Charles Heidsieck Blanc des Millénaires, having enjoyed extensive lees aging, offers a sophisticated bouquet of toasted brioche, candied lemon peel, hazelnut, and delicate white flowers, underpinned by a distinctive chalky minerality. On the palate, it is rich and creamy, yet retains a remarkable freshness and vibrancy due to its powerful acidity. Flavors echo the nose with layers of patisserie, dried apricot, and a hint of salinity, culminating in a long, elegant, and mineral-driven finish with a fine, persistent mousse.