Preheat oven to 350°F. Prepare 12 regular-sized muffin tins with silicon liners, paper liners, or by brushing tins with coconut oil.
In a medium bowl, combine 100% whole wheat flour, cacao powder, baking soda, and salt. Whisk together and set aside.
In a large bowl, combine coconut oil, honey, vanilla, egg, and milk. Whisk to combine. Then, add zucchini and stir until well incorporated.
Add dry ingredients to the zucchini mixture and stir just until combined. (Do not overmix or you may end up with tough muffins.)
Gently stir in chocolate chips.
Evenly divide batter into the 12 prepared muffin tins.
Bake muffins at 350°F for 21-23 minutes or until an inserted toothpick comes out clean.
Let muffins sit in the tin for 1-2 minutes, then transfer to a wire rack to cool. Enjoy!
Notes
These muffins freeze extremely well, which lets you enjoy chocolatey goodness whenever you want. To freeze, let cool completely, then transfer to a freezer-proof container. To thaw, take out of the freezer a couple hours before you'd like to enjoy a muffin. Or, if your craving strikes quickly, throw the frozen muffin in the microwave for 45 seconds and let it sit for a minute before diving in.