3 double chocolate european style Recipes

unsalted butter, bittersweet chocolate, broken into small pieces (recommended brand : godiva dark), extra-fine granulated sugar, dutch-style cocoa (recommended brand : hershey s premium european-style), eggs, vanilla extract

eggs (300 g), granulated sugar (300 g), salt, unsweetened cocoa powder , dutch processed preferred (100 g), unsalted butter , cut into 2 tbsp chunks at a cool room temperature of 65 degrees f (680 g), vanilla extract, dark chocolate, melted and cooled (450 g)