Preheat oven to 350 F and oil 8x8 pan.

In a large bowl, add banana and mash. Add egg and mix with banana until it is well combined. Add Nutella and continue mixing. Then add flour and mix until well combined.

Pour into baking dish and bake for 20-25 minutes and allow brownies to cool for one hour.

To make heart shapes, take cookie cutter and cut into brownies, sprinkle powdered sugar or decorate with cookie icing.