Preheat the oven to 400°.
Cut the ends off the zucchini and cut it into chunks. Place the chunks into a food processor and pulse the zucchini until it is shredded. Set it aside.
In a large bowl, add the sugar and oil. Mix the oil and sugar well until fully combined.
Add the eggs and cooled coffee and mix.
Add the zucchini to the bowl and fold in the zucchini.
In a mesh strainer, add the flour, cocoa powder, baking powder, and salt and sift the dry ingredients into the bowl. Gently mix to combine.
Add the chocolate chips to the bowl and mix a few times to combine the chocolate chips, but not to overmix.
Spray a loaf pan with cooking spray and add the batter to the loaf pan. Top with more chocolate chips, if desired, and bake in the oven for 1 hour. After 1 hour, check to see if a toothpick comes out clean. You might get chocolate on the toothpick, but you don't want to have batter on the toothpick.
Allow the bread to cool for at least an hour before cutting.