INGREDIENTS
For the cake:
2 1/4 cups
all-purpose flour
2 1/4 cups
sugar
1 cup
plus 2 tablespoons dark unsweetened cocoa powder
2 1/4 tsp
baking soda
1 1/2 tsp
baking powder
1 1/2 tsp
salt
6 tbsp
vegetable oil
1 cup
plus 2 tbsp. buttermilk
1 cup
plus 2 tbsp. brewed coffee*
3
large eggs, at room temperature
1 tbsp
vanilla extract
For the filling:
1 cup
sugar, divided
1/4 cup
water
1/4 cup
heavy cream
Generous pinch of sea salt, such as fleur de sel
4
large egg whites
1 1/2 cups
unsalted butter, at room temperature
For the frosting:
12 oz
good quality semisweet or bittersweet chocolate, finely chopped
1/4 cup
unsweetened Dutch-process cocoa powder
1/4 cup
very hot water
1 cup
plus 2 tbsp. (18 tbsp.) unsalted butter, at room temperature
1/3 cup
plus 1 tbsp. confectioners’ sugar
salt
Fleur de sel, for finishing
*Note – Coffee is used as a flavor enhancer in many chocolate cake recipes. Even if you are not a fan of coffee, don’t be afraid of this – it’s still chocolate cake, and you don’t taste the coffee.