I'd like a donut but I can't do the sugar. Is it possible to make protein donuts?
The answer is yes. But there are a few things you have to keep in mind to avoid getting a batch of rubbery, dry, round-ish, donut-esque "things."
First, you must create a batter that isn't more than 25 percent protein powder. It's better if you use a veggie powder, a protein blend, or casein. You can use a whey concentrate or isolate, but the final product may end up a bit, well, rubbery.
Second, your batter must contain either ground almonds, ground cashews, or another ground nut. This will help offset any dryness. You can use nut butter, too, but ground nuts work best.
Third, use eggs. You can use either whole eggs or egg whites, but you must have them in the batter.
Finally, to give your donuts "body," use oat flour, ground oat, buckwheat flour, amaranth flour, coconut flour, or some combination of the above.