INGREDIENTS
1
Chocolate espresso beans
6
Egg whites, large
4
Eggs, large
3 cups
All-purpose flour
1 tsp
Baking powder
1 tsp
Baking soda
3/4 cup
Cocoa powder, unsweetened
1
Coffee meringue buttercream
1/4 tsp
Cream of tartar
1 1/2 tsp
Kosher salt
1 pinch
Kosher salt
4 1/4 cups
Sugar
6 tsp
Vanilla, pure
3/4 cup
Coffee or espresso, hot
2 1/4 lb
Butter, unsalted
1 cup
Sour cream
1/4 cup
Coffee liqueur
2/3 cup
Water