Preheat your oven to 350°F (175°C). Grease a loaf pan.
In a bowl, whisk together flour, baking powder, baking soda, salt, cinnamon, and nutmeg.
In another bowl, mix sugar, oil, eggs, and vanilla until well combined.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Fold in the grated zucchini.
Pour the batter into the prepared loaf pan.
Bake for 60 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.