INGREDIENTS
1
Egg + 1 egg yolk, large
1/4 cup
Nutella
1 1/4 cups
All-purpose flour
1 1/4 tsp
Baking powder
1/2
Scant cup Cocoa powder
1
Colored sprinkles
7/8 cup
Granulated sugar
2 cups
Powdered sugar
1/2 tsp
Salt
1 tsp
Vanilla extract
13 1/2 tbsp
Butter, unsalted
2 1/2 tbsp
Heavy cream
2 tbsp
Milk
1/2 cup
Sour cream