INGREDIENTS
1
Egg yolk
2
Eggs, large
1 cup
All-purpose flour
1 tsp
Baking powder
1/2 tsp
Baking soda
1/4 cup
Brown sugar, packed light or dark
1 1/4 cups
Cocoa powder, unsweetened natural
3/4 cup
Granulated sugar
2 1/2 cups
Powdered sugar
1/2 tsp
Salt
1 1/2 tsp
Vanilla extract
1/3 cup
Vegetable oil
1/2 tsp
Espresso, powder
1 stick
Butter, salted
1/3 cup
Buttermilk
3 tbsp
Milk
1/3 cup
Water, hot