Preheat the oven to 350 degrees and grease a 9 by 13 inch baking pan.
Sift the flour, cocoa powder, baking soda, and salt into a small bowl.
In a large bowl, mix together the eggs, maple syrup, applesauce, and coconut oil. Stir in the zucchini.
Add the dry ingredients to the large bowl. Stir together to combine. Stir 3/4 cups chocolate chips into the batter.
Transfer the batter to the baking pan. Sprinkle the remaining 3/4 cup of chocolate chips on top.
Bake for 25 to 30 minutes, or until a toothpick inserted in the center comes out clean.