Preheat oven to 350 degrees and grease a 9 x 4 inch loaf pan. If desired, line with parchment.

In a medium bowl combine the flour, cocoa, baking soda, baking powder, salt, cinnamon and allspice.

In a separate bowl combine the oil, sugars, eggs and vanilla. Add the dry ingredients in two additions, mixing between each until the batter is just combined. Fold in the chocolate chips and shredded zucchini.

Pour the batter into the greased loaf pan and bake for about 1 hour, or until a toothpick inserted into the middle comes out clean. Let the bread rest for about 10 minutes in the pan, then turn it out and cool completely on a cooling rack before slicing.