Preheat the oven to 180 Deg Celsius.
Line a 8 Inches loaf pan with liner or one can just spray or grease the pan with oil.
Grate the Zucchini using a medium size grater.
In a large bowl, whisk together the whole wheat flour, cocoa powder, baking soda, baking powder, salt and ground cinnamon.
Fold in the chocolate chips.
In another large bowl whisk the eggs.
Then add the oil, sugar and vanilla extract and whisk until well blended.
Fold in the grated zucchini.
Add in the flour mixture and fold in gently.
Stirring until just combined. Do not over mix.
Fill in the Loaf pan to 2/3rd with batter and bake for 55-60 minutes.
The bread is done when a toothpick inserted comes out clean.
Remove from oven and place on a wire rack. Let it cool for 10-15 minutes.
After that remove it from the pan and let it cool completely on a wire rack.
Yummy and chocolaty Zucchini Chocolate Whole Wheat Bread is ready.