Chocolate and banana is always a winning combination, and these muffins are no exception. Whip up a batch whenever your sweet tooth is acting up, and enjoy a guilt-free treat with just the right amount of sweetness. The bananas are the key to sweetening this muffin without the need for a lot of sugar, while Greek yogurt and optional whole wheat flour add protein and fiber for a healthy treat any time. Our kids love these for a high-energy, after-school snack that tastes great, and we like them for a special, waistline-friendly indulgence! We like to make these on the weekend and enjoy them with our morning coffee, then munch on the leftovers all week long!