You should definitely try this recipe for healthy and delicious chocolate zucchini muffins. They are so soft, moist and rich that you will want more. We used here gluten-free millet flour because we wanted these muffins to be gluten-free but you can also use any other flour. Be sure to use quality dark chocolate and cocoa powder which will give rich chocolate taste to the muffins. A dash of amaretto liqueur is always a plus so we added it to the muffins. Grated zucchini make these muffins moist.