They're super fudgy and full of chocolate!
Extra cinnamon is added to the top before baking too.
Gather your simple ingredients.
Then add the banana, egg, and vanilla extract.
Melt the butter and chocolate until smooth.
Whisk together the sugar, eggs, and egg yolk for 3 minutes.
Then whisk in the oil, vaniila, and melted chocolate.
Then gently fold in the dry ingredients.
Pour into prepared pan along with the cinnamon topping.
Cut into squares and enjoy!
Grab all of the recipe details, baking tips, and more below!