01 - Preheat the oven to 350°F. Grease and flour a 9x5-inch loaf pan or line it with parchment paper.
02 - Place the grated zucchini in a clean kitchen towel and squeeze out excess moisture. Set aside.
03 - In a medium bowl, whisk together all-purpose flour, baking soda, baking powder, salt, and ground cinnamon until evenly mixed.
04 - In a large bowl, beat eggs with granulated sugar and brown sugar until combined. Incorporate vegetable oil and vanilla extract by whisking thoroughly.
05 - Gradually stir the dry ingredients into the wet mixture until just combined, avoiding overmixing to maintain tenderness.
06 - Gently fold grated zucchini, chocolate chips, and optional nuts into the batter until evenly distributed.
07 - Pour the batter into the prepared loaf pan and smooth the surface evenly.
08 - Bake for 50 to 60 minutes, or until a toothpick inserted into the center emerges clean or with a few moist crumbs attached.
09 - Allow the bread to cool in the pan for 10 minutes before transferring to a wire rack to cool completely prior to slicing.