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

In a mixing bowl, combine all dry ingredients: flour, baking soda, baking powder, salt, cinnamon, and nutmeg.

In another bowl, whisk together the granulated sugar, brown sugar, vegetable oil, and eggs until well combined.

Stir in the grated zucchini and vanilla extract into the wet mixture.

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

Pour the batter into the prepared loaf pan.

Bake in the preheated oven for 60 minutes, or until a toothpick inserted in the center comes out clean.

Allow the bread to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.