Use 1/3 cups of sugar. This is fine. If you like sweet things, you can add a bit more.
Mix the flour and sugar together.
Beat the egg. If you do this in the measuring cup you can cut down on the washing.
Add the beaten egg all at once into the mixed flour and sugar! Mix it up vigorously.
The dough will become very sticky, but just keep mixing it. I recommend using your hands.
When rolling the dough into bite sized pieces, I recommend wetting your hands with water first. If you oil your hands the dough gets really sticky, and it's harder to roll.
Roll the dough into bite sized balls (about 2 to 3 cm I think) and fry them slowly in 160 °C oil.
When you fry the donuts slowly at a low temperature, they will split open. That's the most important part! Now they are done.
These are very simple and plain, so you can vary them in many ways. I recommend dark brown sugar!
Story Behind this Recipe
I wanted to eat these right away!! I made them while thinking back to the ones I had a long time ago! I made these as an experiment using a standard ingredient ratio, but they were such a big hit I immediately tripled the amounts. Those disappeared in no time too.
The key point is to fry the donuts in low temperature oil! That's it really. When I tried making triple the amount of dough, it was really tough to knead it all at once! It was so hard to work in the flour! So, it's best to knead it in 3 batches of the basic amount, and then combine the batches at the end. This is not only easier in the end, it's harder to mess up and will ultimately result in better-tasting donuts.