01 - Preheat oven to 350°F. Grease a 9x5-inch loaf pan and line with parchment paper for easy removal.
02 - Place grated zucchini in a clean kitchen towel and firmly squeeze out excess moisture. Set aside.
03 - In a medium mixing bowl, whisk together flour, baking soda, baking powder, salt, and cinnamon until well blended.
04 - In a large bowl, whisk eggs, vegetable oil, granulated sugar, brown sugar, and vanilla extract until the mixture is smooth and homogenous.
05 - Gently fold the dry ingredient mixture into the wet ingredient bowl until just combined. Avoid overmixing to maintain tender texture.
06 - Fold in the drained zucchini, chocolate chips, and nuts if using, ensuring even distribution throughout the batter.
07 - Pour the batter into the prepared loaf pan, smoothing the surface with a spatula.
08 - Bake on the center rack for 50 to 55 minutes, or until a toothpick inserted into the center emerges with moist crumbs but no raw batter.
09 - Allow loaf to cool in the pan for 10 minutes. Unmold and transfer to a wire rack to cool completely before slicing.