Made these with hazelnut flour instead of almond...I've been using it in place of almond flour for microwave muffins and it is yummy! So thought I'd try. Makes for a nuttier texture, that's for sure, but still bakes up very well. I doubled the batch and baked in an 8x8 pan. Brownies were lofty, dark chocolatey, and you surely do not need to add any further nuts! The taste is like a Nutella cake.