Roast the hazelnuts
13 minSpread the hazelnuts in a single layer on a tray and roast them in a 150°C / 300°F oven for 12 minutes. The roast directly affects the flavor: hazelnuts that are too pale will be overpowered by the cocoa, while over-roasted nuts will taste bitter. When broken open, the centers should be honey-colored rather than cream-colored.