Preheat oven to 350 degrees F (175 degrees C). Lightly grease two 9x5 inch loaf pans.
Step 2
In large bowl, combine flour, cocoa, cinnamon, baking soda, baking powder and salt, mix well. In separate bowl, combine sugar and eggs, beat until well blended. Add oil and vanilla; beat until combined. Stir in zucchini. Add flour mixture; stir just until moistened. Stir in nuts and chocolate chips. Spoon evenly into loaf pans.
Step 3
Bake in preheated oven for 55 to 60 minutes, or until toothpick inserted in center comes out clean. Cool in pans for 10 minutes. Remove bread from pans; cool completely on wire rack.