Preheat your oven to 350°F and line an 8×4-inch loaf pan with parchment paper, leaving some hanging over the sides.
Sift the flour, baking soda, baking powder, salt, cinnamon, and nutmeg into a large bowl and whisk well.
In another bowl, whisk the sugar, melted butter, eggs, and vanilla extract until the mixture is smooth.
Add the wet mix to the dry mix and whisk to combine.
Gently fold in the shredded zucchini and nuts.
Pour the batter into the prepared loaf pan and spread it out evenly. Bake in the preheated oven for about 35 to 45 minutes, or until a toothpick inserted into the center of the bread comes out clean. Allow it to cool slightly before slicing.