Spray an 8"x8" baking pan with coconut oil spray. Line with foil and spray the foil with coconut oil spray as well.
In a double boiler on low-medium heat, add coconut oil and dark chocolate chips. Once melted, turn off the stove. Set aside to cool.
In a food processor, add the avocado, eggs, maple syrup and vanilla. Blend until well-combined.
Now add the cacao powder, coconut flour, salt and the cooled dark chocolate. Blend.
At this time you can add the walnuts and pulse a few times in the food processor, OR you can chop up the walnuts and fold it into the batter. I personally prefer folding the walnuts into the batter so the walnuts are more obvious in every bite and not chopped up into tiny pieces.
Batter is ready.
Pour brownie batter into the lined foiled pan.
Into the oven for 30 minutes.
Cut into 16 squares ( I did 12, but 16 is the right amount ). Enjoy!