I had never heard of it, so off to Google I went. At first, when you where talking about it, I though maybe it was kind of like Moravian Sugar Cake because of the cinnamon and sugar in it, but I see it's not. I found this one blog where people were using the starter for other things like muffins and pancakes. The lady who writes the blog had made a chocolate banana Amish friendship bread. Sounds good and I might have to try making some.
The blog I was telling you about has some good ideas what you can do with the starter... just don't put it near a heating vent like one person did, because after being there for a few days it exploded.
Stop the Ride!: Chocolate Banana Amish Friendship Bread