Preheat your oven to 350 degrees, and line a 9"x9" baking pan with parchment paper.
In a large mixing bowl, whisk your egg.
Add your nut butter and coconut sugar (or maple sugar), and mix to combine.
Next, add your cocoa powder. It's easiest if you do it a little at a time as it gets harder and harder to combine.
Add the rest of the ingredients (chocolate chips, vanilla, baking soda, and salt). Mix up until it's all incorporated. Depending on how firm or oily your nut butter was you may have to pull your sleeves up and use your hands to finish combining all of the ingredients.
Dump your mixture into your parchment lined pan and spread out with your hands. I sprinkled a little salt on top, but that's optional.
Cook your brownies in the oven at 350 degrees for 14-16 minutes. The brownies will rise quite a bit in the oven and they'll be just a little squishy when they're ready, slightly underdone looking. That's what you want! Allow them to fully cool (THIS IS IMPORTANT) or they won't stay together for you.
Cut into squares and serve.
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