These are the most moist, soft, sweet and delicious zucchini muffins out there. And that's promising a lot, I know, but after countless tests, I feel confident saying these zucchini muffins with a swirl of cinnamon chocolate are the real deal. They have a simple chocolatey topping, a swipe of cinnamon chocolate inside, and a moist zucchini cake texture that you won't be able to get enough of.