Preheat your oven to 350 degrees Fahrenheit. Prepare an 8.5″ x 4.5″ loaf pan by lining it with parchment paper.
In a large bowl, combine the flour, cocoa powder, baking soda, and salt. Whisk the dry ingredients together until well mixed and set aside. I recommend sifting the dry ingredients, especially cocoa powder to prevent any lumps in the batter.
In a separate medium bowl, mix the sugar, oil, milk, applesauce and vanilla until they are well blended.
Combine the wet and dry ingredients. Gradually add the dry mixture to the wet mixture, stirring until everything is thoroughly incorporated. Gently fold in the chocolate chips and zucchini.
Transfer the batter into the prepared loaf pan and smooth the top. Decorate with more chocolate chunks.
Bake in the preheated oven for approximately 50 minutes, or until a toothpick inserted into the center of the loaf comes out clean.
Once baked, allow the loaf to cool in the pan before removing it. Once cooled, carefully slice the loaf, serve, and savor every bite!