INGREDIENTS
10 tbsp
butter
1 3/4 cups
graham cracker crumbs
4 tbsp
sugar
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
6 oz
semisweet chocolate chips
2/3 cup
heavy cream
4
egg whites
1 cup
granulated sugar
1/4 tsp
cream of tartar
1 tsp
pure vanilla extract