For the cinnamon sugar:
For the donuts:
* Do not knead the dough or incorporate the flour into it, or it will turn out dry—just pat it into shape.
** To get a really good re-roll out of the scraps, try not to let any flour touch the freshly stamped edges, and compress them together so the bare edges mush together with other bare edges. Try not to introduce a lot of new flour. Feel free to fry the donut holes, or re-roll them with the scraps (if you fry them, they will take about 30 seconds less per side).