This is something I've wanted to try for a long time and finally got the opportunity. It's from a little booklet of recipes I got ages ago - Breads, Breads and more Breads, copyright 1983 by the Pillsbury Company. The marshmallows melt during baking, which leaves a hollow center coated with cinnamon. One change I would do is to make more of the sugar-cinnamon filling mix. I ended up doing that while making these. Prep time is approximate and does not include rising times. The filling can spill out during the baking, so be aware of that. Maybe put a cookie sheet underneath to catch the spills. They were fun to make and I'll certainly make them again.