Nutella filled cinnamon sugar muffins

I've been thinking about making this recipe for weeks, and finally did.  I'm not sure if I didn't put enough Nutella, but I didn't get Nutella in every single bite as promised.  I decided to add a little spoonful of Nutella on top of each muffin after adding the cinnamon/sugar/butter topping.  

The original recipe can be found here.  Her photos are much more drool-worthy.  Make these!