INGREDIENTS
2 1/4 cups
all-purpose flour
2 1/4 cups
superfine sugar
3/4 cup
dark Dutch-process cocoa powder (I use Cacao Barry Extra Brute)
2 1/4 tsp
baking soda
2 1/4 tsp
baking powder
1 tsp
salt
1 cup
buttermilk
3/4 cup
brewed coffee or espresso, hot
1/3 cup
vegetable oil
3
eggs, room temperature
1 tbsp
pure vanilla extract
6
egg whites
1 3/4 cups
sugar
2 cups
unsalted butter, softened, cut into cubes
2 tsp
vanilla bean paste or 1 vanilla bean, seeded and scraped
salt
2 cups
sugar
1/2 cup
water
1 cup
heavy cream (whipping cream)
2 tbsp
unsalted butter
2 tsp
pure vanilla extract or vanilla bean paste
Generous pinch of sea salt (I used Fleur de Sel)
1 cup
all-purpose flour
1/4 cup
sugar
1/2 cup
unsalted butter, softened, cut into cubes
1 lb
plus 6 ounces (700 g) best-quality dark chocolate (at least 53% cocoa solids), chopped or callets
2 cups
heavy cream (whipping cream)
1/3 cup
corn syrup
1/4 tsp
sea salt
8 tbsp
unsalted butter, cut into cubes
1 tbsp
pure vanilla extract