Stir together coconut flour, cocoa, sweetener, cinnamon, baking soda, baking powder and salt.
Mix in eggs, coconut oil, and vanilla until well blended. Stir in zucchini and chocolate chips (if using).
Pour mixture into greased pan (I used a 9×9).
Bake at 350 degrees for about 40 minutes or until toothpick inserted in center comes out clean.