DH made me the most delicious gluten free donuts and timbits ever. Mine were coated with cinnamon and sugar and tasted like those Elephant Ears you get at the fair! My absolute favorite, have actually eaten even though I get horribly ill treat.
We use Namaste All Purpose Flour blend, which a totally gluten free mix made in a dedicated facility. I use this flour for everything and it works as a straight substitution. Everything I've made has turned out wonderfully and DH and Little Bit eat it without noticing a difference.
The only thing with these donuts is they do get dense after sitting out for a day or two, which means store in an air tight container if they somehow manage to last that long. Ok they actually make a lot of donuts so maybe freeze some, or be like me- a total glutton and eat them all!
The recipe can be found here. We substituted 1 cup apple sauce for the sweet potato, you don't taste the apple sauce. Oh we, this is the royal we by the way, used our little deep fryer, and drained them on a wire rack over a backing dish.
We also did some with sugar and cinnamon sprinkled on, some plain, and some with blueberry icing. Basically something for all of us.