INGREDIENTS
1 cup
dark beer (I used coffee stout)
1 stick
unsalted butter
1/2 cup
+ 1 tablespoon unsweetened cocoa powder
1 cup
+ 2 tablespoons granulated sugar
2 oz
unsweetened chocolate, chopped (optional)
1
large egg white
1 tsp
vanilla extract
1/4 tsp
salt
1/2 cup
all-purpose flour
6 tbsp
unsalted butter, softened
1 cup
powdered sugar