I've long been a fan of Peach Upside Down Cake, so when I found this recipe on the web, I had to try it. They're cooling right now and I can't wait to dig in! NOTE: I halved the butter and brown sugar as an easy way to cut some fat and calories. I had a little trouble getting them out of the pan and some of the peaches slipped off and had to be put back on, but there doesn't seem to be a significant compromise to the muffin. I'm interested if the results differ if you use all the butter and brown sugar that's called for. Also, you could easily stretch more than 12 muffins out of this recipe.