Tink,
You weren't kidding...these are fantastic! They are a sure-fire butter-and-brown-sugar delivery system, though (and I say that in a good way). I love them, and will make them often. In fact, I am thinking about making them again today. For me, they are in the category of "scary good."
I recommend dark brown sugar and unsalted butter.
Tip: cut them into 24 pieces while hot, but don't remove them from the pan into the storage container until they are completely cooled, or they will fall apart. They don't have any flour in them to hold them together, so they must be cool.