These muffins are unbelievably moist and they taste so decadent and chocolatey that you'd never guess the secret ingredient is zucchini!!
Add the flour to the bowl, along with the cocoa powder, baking soda, salt and cinnamon.
With a wooden spoon or rubber spatula, mix all the ingredients together just until combined.
Add the 1 1/2 cups of chocolate chips to the batter and fold them in carefully without over-mixing, reserving the other 1/2 cup to sprinkle on top of the muffins if you wish.