Preheat your oven to 350 degrees F. Line an 8.5" x 4.5" loaf pan.
In a large bowl, sift together the flour, cocoa powder, baking soda, and salt. Whisk together and set aside.
Add the ground flax and water to a small bowl and whisk together until combined. Set aside and allow the mixture to thicken.
In another separate medium bowl, mix together the sugar, butter, milk, and vanilla until well combined. Add the flax mixture and mix again.
Combine the wet and the dry ingredients. Fold in the chocolate chips and the zucchini.
Transfer the batter to the baking pan and bake for 50 minutes, or until a toothpick inserted into the center of the loaf comes out clean.
Cool the loaf before removing it from the pan. Slice, serve, and enjoy!
Video
Notes
Storing Leftovers: This chocolate zucchini bread stores well at room temperature in an airtight container for up to a few days or in the refrigerator for up to a week.
Freezing Instructions: You can also freeze this recipe! Cut the bread into slices before freezing which allows you to easily thaw them out for snacks, lunches, dessert, and beyond.