For vanilla cake:
- 4 large eggs, room temperature
- 1 2/ cup + 1 1/2 tablespoons (120 g) granulated sugar
- 1 sachet (9 g) vanilla sugar
- 4.2 oz. (120 g) unsalted butter, softened
- 1 cup + 2 1/2 tablespoons (145 g) all-purpose flour
- 1/2 cup + 1 1/2 tablespoons (96 g) potato starch
- 2 3/4 teaspoon (13 g) baking powder
For the chocolate frosting:
- 14.6 oz. (415 g) dark chocolate, 70% cocoa
- 1 cup (240 g) heavy cream, 30% fat
- 2 oz. (55 g) unsalted butter, softened
For chocolate shavings:
- 3 oz. (85 g) dark chocolate, 70% cocoa