These brownies may be made with all purpose flour too. But incase you have always wanted to try an alternate flour like whole wheat, this is the recipe to choose.
I personally do not like using Nutella on a regular basis. An alternative to this would be preparing it at home or mixing melted dark chocolate with some yummy homemade nut butter.
This recipe can be easily doubled to make a bigger batch of brownies. [ Increase the baking powder to 1 tsp in this case]
Hoping to see your Nutella brownies soon. Do share your feedback.