INGREDIENTS
1
Egg, large
3/4 cup
Nutella
1 1/2 cups
All-purpose flour
1 tsp
Baking soda
1/3 cup
Brown sugar, dark
1/2 cup
Cocoa powder
1/3 cup
Granulated sugar
1 cup
Powdered sugar
1/2 tsp
Salt
1 1/2 tsp
Vanilla
1 stick
Butter, unsalted
2 tbsp
Milk or water
2 tbsp
Water