Pastry chefs never melt couverture over a boiling pan or in a warm bowl: the one temperature range that keeps it glossy right to the end
Professional chocolatiers know a secret: 55°C is the magic ceiling for melting couverture, roughly 30 degrees cooler than boiling water. Cross that line or let steam sneak in, and your glossy shell turns dull and grainy. Learn the exact techniques pastry chefs use to achieve perfect chocolate every time.