Preheat oven to 350°F (175°C).

Grease and flour two 9-inch loaf pans.

In a large bowl, combine flour, baking powder, soda, cinnamon, nutmeg, and cardamon (if using).

Add chopped nuts to the dry ingredients.

In a separate bowl, whisk together vegetable oil, eggs, sugar, and vanilla.

Pour the wet ingredients into the dry ingredients and mix well.

Stir in the shredded zucchini.

Spoon the batter evenly into the prepared loaf pans.

Bake for 1 hour, or until a wooden skewer inserted into the center comes out clean.

Let cool in the pans for 10 minutes before removing to a wire rack to cool completely.

Slice and serve.