01 -
Heat oven to 350°F. Line a 4×8 or 5×9 inch loaf pan with baking parchment or spray well with nonstick cooking spray.
02 -
Using a whisk, blend eggs, oil, sour cream, brown sugar, granulated sugar, and vanilla extract in a large measuring jug until combined, breaking up any lumps of brown sugar.
03 -
In a large bowl, whisk together all-purpose flour, cocoa powder, baking powder, baking soda, and salt.
04 -
Using a rubber spatula, fold shredded zucchini into the flour mixture, ensuring it is evenly distributed. Add chocolate chips and fold them in as well.
05 -
Pour the wet ingredients into the dry ingredients. Using a rubber spatula, stir just until combined and no dry flour is visible. Do not overmix.
06 -
Pour the batter into the prepared pan. Sprinkle with additional chocolate chips if desired. Bake at 350°F for 45-55 minutes, until the top is risen and a toothpick inserted into the middle comes out clean. Cover bread with foil after 25-30 minutes if the top gets too dark.
07 -
Once baked, remove the pan from the oven and let it rest on a cooling rack for 5-10 minutes. Remove the bread from the pan, peel off parchment, and let it cool completely on the rack before slicing.