Preheat the oven to 350ºLine an 8x8 baking pan with parchment and grease the uncovered sides with cooking spray. Set aside.
Add the cashew butter, banana, flax egg, and coconut sugar into a bowl. Beat until smooth. Stir in the cacao powder, protein powder, baking powder, and salt.
Place the shredded zucchini in a clean dish towel and press out as much liquid as possible (do this over the link). Add the zucchini and chocolate chips into the bowl and fold them into the batter.
Transfer the batter to the prepared tin and bake for 30 - 35 minutes. Allow the brownies to cool completely before slicing into squares and enjoying!*
Video
Notes
* these brownies are very fudgy, so if that's not your thing you should try these instead!