You've probably made something like this before...I think we made them every year in Girl Scouts when I was a kid. They are totally just as yummy now as they were then.
Cinnamon Sugar Donuts
I should note that I also used a bottle cap as a donut cutter, I think it's just genius! I also used butter to dip the donuts and I liked them better with just the top dipped as I felt there was too much sugar if I dipped the whole donut (I followed the directions and dipped the whole donut the first batch I made *pictured* but made them the other way for a second batch and liked them MUCH better). Bug LOVED these and, as is normal, Punk wouldn't touch them because he distrusts ALL new food I try to introduce him to (but will eat just about anything offered to him by the sample ladies at Costco).