INGREDIENTS
1 1/4 cups
all-purpose flour
1 tbsp
unsweetened cocoa powder
1 1/4 tsp
baking powder
1/4 tsp
salt
1/4 cup
granulated sugar
3 tbsp
packed light-brown sugar
1/3 cup
Nutella
3 tbsp
butter (, softened)
1
large egg
1/2 tsp
vanilla extract
1/2 cup
milk
1 cup
powdered sugar
2 1/2 tbsp
Nutella
4 tsp
milk
1/2 tsp
vanilla extract
Chopped (, toasted hazelnuts or sprinkles, for topping (optional))