INGREDIENTS
1
Egg, large
1 1/8 cups
All-purpose baking flour
1 tsp
Baking powder
1/4 cup
Brown sugar, packed light
3 tbsp
Cocoa powder
1/4 cup
Granulated sugar
1 cup
Powdered sugar
3/4 cup
Rainbow sprinkle
1/2 tsp
Salt
2 pinches
Salt
1/4 tsp
Vanilla
2 1/2 tbsp
Butter, unsalted
2 1/2 tbsp
Heavy cream
1/2 cup
Milk
For the black (chocolate) frosting: