INGREDIENTS
Cake::
Unsweetened cocoa powder for dusting
10 oz
bittersweet chocolate, finely chopped
3/4 cup
unsalted butter, cut into 6 pieces, plus extra for greasing
5
large egg yolks
1/4 cup
plus 2 tablespoons sugar
1 tbsp
dark rum or brewed espresso (optional) (I used 1/2 teaspoon instant espresso powder)
1 tsp
vanilla extract
salt
3
large egg whites, at room temperature
Chocolate Glaze::
1/2 cup
butter
8 oz
chopped bittersweet chocolate
2 tbsp
light corn syrup