Preheat oven to 350 degrees. Add muffin wrappers or spray inside of muffin tin with cooking spray.
Add the first six ingredients into a medium-sized bowl and mix together with a whisk.
Add next six ingredients into the bowl with dry ingredients.
Fold in the chocolate chips and shredded zucchini. Batter will be thick. Add additional splashes of milk as needed until all ingredients are incorporated.