Preheat the oven to 350°F (175°C) and grease a loaf pan.

In a mixing bowl, whisk together the dry ingredients: flour, baking soda, baking powder, salt, and cinnamon.

In another bowl, combine the grated zucchini, granulated sugar, brown sugar, vegetable oil, eggs, and vanilla extract.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Pour the batter into the prepared loaf pan and smooth the top.

Bake in the preheated oven for 45-50 minutes, or until a toothpick inserted into the center comes out clean.

Let the bread cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.