This chocolate zucchini cake is absolutely delicious. Zucchini bread can sometimes be bland and boring but this recipe is packed with flavor. The cocoa powder marries well the cinnamon and the zucchini is a great way to add body to the loaf. If you want to take the chocolaty-ness to the next level, feel free to add a 1/2 cup of dark chocolate chips to the batter. Chocolate zucchini bread is a great way to use up this abundant summer vegetable!