INGREDIENTS
1 1/2 cups
all-purpose flour
1 tsp
baking soda
1 tsp
baking powder
1/4 tsp
salt
1 1/4 cups
boiling water
1/2 cup
cocoa powder
4 oz
semisweet chocolate chips
1 tsp
instant espresso or instant coffee powder
10 tbsp
unsalted butter, softened
1 1/2 cups
packed light brown sugar
3
large eggs
1/2 cup
sour cream
2 tsp
pure vanilla extract
1/2 cup
unsalted butter
1 cup
packed brown sugar
1/4 cup
milk
2 cups
confectioner's sugar
1 tsp
Kosher salt
1 tsp
flaked sea salt
1/2 cup
unsalted butter, softened
1 cup
cocoa powder
1/2 cup
vegetable oil
1 1/2 cups
confectioner's sugar