Preheat the oven to 350°F.Grease a loaf tin with butter or cooking spray.
Use a food processor or cheese grater to grate your zucchini. Squeeze as much water out of the grated zucchini as possible to avoid a mushy loaf.
Sift the flour, cocoa powder, baking soda, baking powder and salt into a mixing bowl. Whisk to combine and set aside.
In a separate mixing bowl, cream the softened stick of butter with the brown sugar and granulated sugar. Use a hand mixer or a wooden spoon with a lot of elbow grease until it is soft and fluffy.
Add the eggs and vanilla and mix until the it is creamy.
Add the dry ingredients into the wet ingredients in two or three additions, mixing slowly after each addition until there is no dry flour visible.
Fold in the shredded and drained zucchini and the chocolate chips.
Pour the batter into the greased loaf tin.Bake for 40 to 50 minutes, until a toothpick inserted into the center of the bread comes out clean. Let cool for 10 minutes, then slice and enjoy!
Notes
There's no need to peel zucchini before you shred it when adding it into zucchini bread.
To drain the shredded zucchini, take a large handful and squeeze it in the palms of your hands over a sink.
Zucchini under 12 inches long generally isn't big enough to get seeds so large that they need to be removed. However, if you're using zucchini that's grown over a foot in length, try to pick out any large seeds while shredding your zucchini.