Creating Luscious Lemon Zucchini Bread is straightforward if you follow these steps:

1. Preheat Your Oven: Begin by preheating your oven to 350°F (175°C). Grease a 9×5-inch loaf pan with cooking spray or line it with parchment paper.
2. Mix Dry Ingredients: In a large bowl, combine the flour, baking soda, baking powder, salt, and cinnamon. Whisk until well blended.
3. Prepare Zucchini: Shred the zucchini using a box grater or food processor. Make sure to squeeze out excess moisture with a clean kitchen towel or paper towel.
4. Combine Wet Ingredients: In another bowl, whisk together the eggs, sugar, vegetable oil, lemon juice, lemon zest, and vanilla extract until well combined.
5. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients. Stir until just combined; avoid over-mixing.
6. Add Zucchini: Fold in the shredded zucchini and chopped walnuts if using, ensuring everything is evenly incorporated.
7. Pour Into Pan: Transfer the batter into the prepared loaf pan, smoothing the top with a spatula.
8. Bake: Place the loaf pan in the preheated oven and bake for 45-55 minutes. A toothpick inserted in the center should come out clean when ready.
9. Cool Down: Once baked, remove it from the oven and let it cool in the pan for about 10 minutes. Then, transfer it to a wire rack to cool completely.
10. Serve and Enjoy: Once cooled, you can slice your luscious bread. For an extra touch, dust the top with powdered sugar.