Creating your delicious Double Chocolate Zucchini Bread is simple with these steps:

1. Preheat Oven: Set your oven to 350°F (175°C) and grease or line a 9×5 inch loaf pan with parchment paper.
2. Sift Dry Ingredients: In a large mixing bowl, sift together the flour, cocoa powder, baking soda, baking powder, salt, and cinnamon.
3. Mix Sugars: In a separate bowl, combine the granulated sugar, brown sugar, and vegetable oil. Beat until well combined.
4. Add Eggs and Vanilla: Mix in the eggs one at a time, followed by the vanilla extract until the mixture is smooth and fluffy.
5. Incorporate Zucchini: Stir in the grated zucchini until evenly distributed.
6. Combine Mixtures: Gradually add the dry ingredient mixture to the wet ingredients, folding gently until just combined. Be careful not to overmix.
7. Add Chocolate Chips: Gently fold in the semi-sweet chocolate chips and chopped nuts if desired, ensuring even distribution throughout the batter.
8. Pour Batter: Transfer the batter into the prepared loaf pan, smoothing the top as necessary.
9. Bake: Place the pan in the preheated oven and bake for 50-60 minutes, or until a toothpick inserted in the center comes out clean.
10. Cool: Remove from the oven and allow the bread to cool in the pan for approximately 15 minutes. Then, transfer to a wire rack to cool completely.

These straightforward steps will lead you to an incredible Double Chocolate Zucchini Bread ready to be shared and enjoyed.