Preheat oven to 350 degrees.
Spray 2 loaf pans with cooking spray- set aside.
In large bowl- sift together sugar, flour, cocoa powder, cinnamon,baking soda & salt.
In smaller bowl whisk together eggs, oil & vanilla.
Pour into dry mixture & mix in with large spatula. Mixture will be very dry & pasty until you mix in the remaining ingredients.
Fold in zucchini & then chocolate chips.
Transfer to your prepared pans & smooth out.
Bake for 50-60 minutes for small loaf pans, 70-80 minutes for larger ones. I used one of each.
Pull out when toothpick test comes out clean.