INGREDIENTS
1/2 cup
unsalted butter, softened
1 cup
granulated sugar
1
large egg
1 tsp
vanilla extract
3
medium bananas
1 3/4 cups
flour
1 tsp
baking powder
1 tsp
baking soda
1/2 tsp
kosher salt
1 cup
unsalted butter, softened
1 cup
Nutella (chocolate hazelnut spread)
1/4 cup
milk
4 cups
powdered sugar