I screwed up. After the little cake jars had been in the oven about 15 minutes, I opened the oven to check on them, and noticed they hadn't raised very much. All of the sudden, I realized that I couldn't remember taking either the baking soda OR baking powder out of the cabinet. Gosh dang-it.
Yeah, they should have risen over the top of the jar. Sensing my distress, my wife ran to the store and bought some vanilla ice cream. Not sure what the Torah or Talmud say about vanilla ice cream, but I say bring it on.
The flavor was actually pretty good, and I will have to try making these again with the right ingredients. This method they did come out a bit floury, but the flavor was good, and the vanilla ice cream cut the floury taste pretty well.