Prep the working area: First start by preparing all the ingredients to have them on hand. Also, preheat the oven and make sure to grease the loaf pan. Dry ingredients: Next, in a large bowl combine the dry ingredients, flour, cocoa powder, baking powder, and salt. Whisk them until combined, or if you have time is better to sift them. Wet ingredients: Afterward, in another bowl, beat the brown sugar with butter, oil, eggs, and vanilla extract. Combine: After that, combine the wet ingredients with the dry ingredients. Also, add the shredded zucchini and stir in the chocolate chips. Bake: Finally, transfer the batter into the prepared pan and bake the bread for about 50-60 minutes. Cool: Once done baking, let it cool in the pan for 15 minutes, and after that remove it and place it on a cooling rack. Serve: Lastly, slice it and serve warm or room temperature, you can also warm up slices in the microwave and it tastes delicious with some butter.