Preheat your oven to 350°F (175°C) and grease a loaf pan.
Grate the zucchini using a box grater or food processor.
In a large bowl, mix the grated zucchini, sugars, and oil until combined.
Add eggs and vanilla extract, mixing well.
In another bowl, whisk together flour, baking soda, baking powder, salt, and cinnamon.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
If desired, fold in nuts and chocolate chips.
Pour the batter into the prepared loaf pan.
Bake in the preheated oven for 50-60 minutes, or until a toothpick comes out clean.
Allow the bread to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.