INGREDIENTS
1
Egg, large
2 cups
All purpose flour
1 tsp
Baking powder
1
Cocoa, Unsweetened
1 cup
Granulated sugar
2 cups
Powdered sugar
1/2 tsp
Salt
1 1/2 tsp
Vanilla
1/2 tsp
Espresso, instant
2 sticks
Butter, unsalted
3 tbsp
Butter
8 oz
Mascarpone cheese
1 tsp
Rum extract