INGREDIENTS
8 tbsp
unsalted butter, cut into 4 pieces
2 oz
bittersweet chocolate, chopped
1/2 cup
Dutch-processed cocoa powder
3/4 cup
all-purpose flour
1/2 tsp
baking soda
3/4 tsp
baking powder
2
eggs
3/4 cup
granulated sugar
1 tsp
vanilla extract
1/2 tsp
table salt
1/2 cup
sour cream
5
large egg whites
5 1/2 cups
sugar
4 sticks
unsalted butter, diced and softened
1/4 tsp
salt
1 tbsp
vanilla
2 tbsp
unsweetened cocoa powder
10 oz
bittersweet chocolate, melted and cooled
2/3 cup
dark chocolate
2 tbsp
heavy cream
4 tbsp
powdered sugar, sifted
4 tbsp
water, warm