01 -
Finely shred zucchini using a box grater or food processor. Place shreds in a clean kitchen towel and squeeze out excess moisture thoroughly to prevent a soggy loaf.
02 -
In a large bowl, whisk together flour, cocoa powder, baking soda, baking powder, salt, and cinnamon until evenly combined and lump-free.
03 -
In a separate bowl, whisk vegetable oil, granulated sugar, and brown sugar until smooth. Add eggs one at a time, whisking after each, then incorporate vanilla extract.
04 -
Gently fold in squeezed zucchini and sour cream to the wet mixture, ensuring even distribution while avoiding overmixing to preserve tenderness.
05 -
Add dry ingredients to wet mixture and stir gently with a spatula until just combined, with no visible streaks of flour; avoid overmixing.
06 -
Reserve a small handful of chocolate chips for topping. Fold remaining chips into batter evenly.
07 -
Grease a 9x5 inch loaf pan and line with a parchment paper sling for easy removal after baking.
08 -
Pour batter into pan, smooth top, and sprinkle with reserved chocolate chips. Bake in preheated oven at 350°F (175°C) for 50 to 60 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
09 -
Allow bread to cool in pan for 15-20 minutes. Remove from pan and transfer to a wire rack to cool completely before slicing for clean cuts and ideal texture.