Preheat oven to 350 degrees F (175 degrees C).

Grease two 9x5 inch loaf pans.

Sift flour into a large bowl.

In a separate bowl, beat eggs and add sugar, oil, vanilla, grated zucchini, nuts (or raisins), cinnamon, salt, soda, and baking powder.

Add the wet ingredients to the dry ingredients.

Mix well until combined, ensuring zucchini is evenly distributed.

Scrape the bowl often and mix for several minutes to ensure even batter consistency.

Pour batter into the prepared loaf pans.

Bake for 1 hour and 20 minutes, or until a wooden skewer inserted into the center comes out clean.

Let cool in pans on wire racks.