Preheat oven to 350 ℉. Grease a 9 x 5 or 8 x 4 bread pan.
Shred zucchini and set aside.
In a medium bowl stir together the flour, cocoa, baking powder, baking soda and salt. Set aside.
In the bowl of a stand mixer beat the sugar, vanilla, oil, eggs and sour cream together. Add the flour mixture and stir until combined. Stir in the chocolate chips, peanut butter chips and zucchini. The batter will be thick.
Pour batter into your loaf pan and bake in preheated 350℉ oven for 45-50 minutes or until a toothpick inserted near center comes out clean with only a few crumbs stuck to it.
Allow to cool 5 minutes in pan and transfer to wire rack to cool completely.