My sister Erin, introduced me to Morning Glory Muffins when we were all staying at the beach a couple of years ago. They are very healthy! We bake them in jumbo muffin tins. The recipe comes from the Earthbound Farms Cookbook, but I found they have the same recipe posted on their website (the one I linked to).
There are a few modifications I make to the recipe that make the muffins better (in my opinion). I use less baking soda (a little over 1 1/2 tsp instead of 2) and I add 1/2 cup of yogurt to the wet ingredients. I also use whole wheat pastry flour for 2 cups of the all purpose flour.
Tommy proudly displays a finished muffin: