
For the cake:
173g unsalted butter, plus more for the pans
3/4 cup cocoa powder, plus more for the pans
1 cup whole milk
1 3/4 cups sugar
2 1/4 cups cake flour
1/2 teaspoon baking powder
1/2 teaspoon bicarbonate of soda
1/2 teaspoon salt
3 large eggs
1 teaspoon pure vanilla extract
For the frosting:
224g white chocolate, chopped, plus shaved chocolate for topping
345g unsalted butter, at room temperature
Pinch of salt
2 1/2 cups icing' sugar
1 1/2 teaspoons pure vanilla extract
Shaved dark chocolate, for topping