I tried the snoball cooking thing again this evening. This time, I mixed the ingredients in the correct order, but appearantly that was not enough. My snoballs were still flat instead of balls, and despite the fact that I added the 1/2 powdered sugar to yesterday's recipe and added 1/2 cup less flour, they still tasted like they had too much flour.
I called Mom and asked her what she thought went wrong. She suggested sifting the flour first next time and then using stick butter instead of the tub butter since it is not quite as soft. If there is a next time...strike two.