INGREDIENTS
1
Egg, large
1
Egg white, large
1 cup
All-purpose flour
1/4 tsp
Baking soda
3/4 cup
Brown sugar, lightly packed light
6 tbsp
Cocoa powder, unsweetened Dutch-process
1
Confectioners' sugar
1/4 tsp
Pepper, coarsely ground
2 tsp
Vanilla extract, pure
1
Vegetable oil spray
1 stick
Butter, unsalted
2 tbsp
Buttermilk