First, preheat your oven to 325°F (160°C). Then, prepare two 9x5 inch loaf pans by greasing them thoroughly with butter or baking spray. A light dusting of flour after greasing will ensure the loaves slide out easily after baking.
In a large mixing bowl, combine the grated zucchini, eggs, vegetable oil, granulated sugar, and vanilla extract. Use a whisk or a spoon to mix everything together until it is well combined and you have a smooth, consistent batter.
In a separate, medium-sized bowl, whisk together the all-purpose flour, baking soda, baking powder, ground cinnamon, and salt. Whisking helps to distribute the leavening agents evenly, which is key for a consistent rise and texture in your finished bread.
Gradually pour the dry ingredient mixture into the wet ingredients. Mix only until the flour is just combined. It’s okay if you still see a few streaks of flour; be careful not to overmix, as this can lead to tough, dense bread.
Now for the best part! Gently fold your cup of chocolate chips into the batter using a spatula. Mix just enough to distribute them evenly throughout the batter. This ensures you get melted chocolate goodness in every single slice.
Divide the batter evenly between your two prepared loaf pans. Bake for 50-60 minutes. You can check for doneness by inserting a wooden skewer or toothpick into the center of a loaf. If it comes out clean, the bread is ready.
Let the bread cool in the pans on a countertop for about 10 minutes. Afterward, carefully turn the loaves out onto a wire rack to cool completely. Allowing the bread to cool fully is important for it to set properly before slicing.