INGREDIENTS
1
Egg, large
1 1/2 oz
Baker's chocolate
3/4 tsp
Baking powder
1/4 tsp
Baking soda
3/8 cup
Cocoa powder, dutch-process
2 cups
Confectioner's sugar
1/4 cup
Granulated sugar
1
I cup all purpose flour
1/2 tsp
Kosher salt
1 2/3 tbsp
Vanilla
2 tbsp
Butter, salted
2 tbsp
Milk
1
Water