Nutella^®-Stuffed Cinnamon-Sugar Muffins

They may look like muffins, but a dunk in melted butter and a generous roll in cinnamon-sugar makes these baked breakfast treats taste like donuts, without the hassle of frying. Hiding inside each muffin is a sweet Nutella^® surprise, which is layered into the batter as you fill the muffin pan. The muffins are ready in a jiffy, making them perfect for busy mornings. Sometimes I double the recipe and send them along with Kevin to work. His co-workers are always tha