Preheat oven to 350 degrees Fahrenheit. Line muffin pan with paper liners.
Grate zucchini. Set aside.
In a large mixing bowl, combine the dry ingredients. Set aside.
In mixing bowl, add in the wet ingredients. Mix well.
Slowly add in dry ingredients and mix until just combined. Add in grated zucchini. Mix again until just combined. Do not overmix.
Evenly distribute the muffin batter between 12 cups. Sprinkle with chocolate chips if desired.
Bake for 13 - 17 minutes. Total time will depend on your oven. Check at the minimum baking time and then add extra time on from there. Watch carefully to ensure they do not dry out!
Let cool on wire rack. Enjoy fresh or store in a cool place out of direct sunlight in an airtight container for up to 3 days.