Take lukewarm water and add sugar and yeast to it. Let it sit for 5 minutes and bubble up.
Next, take a mixing bowl. Add the all purpose flour and salt and mix.
Add in the yogurt next and mix.
Add yeast mixture and give it a good mix. Bring the dough together as much as you can.
Knead into a smooth dough by taking it out of the bowl and onto a surface. Add more flour if needed.
Transfer back the dough into the bowl and cover with a wet cloth. Let the dough rest for an hour. Post an hour, it should double in size.
Pre-heat the air fryer.
Once the dough has risen to twice its size, make tiny roundels of the dough. Make as many as you can.
Coat the roundels with 4 tbsps melted butter.
Transfer them to the air fryer and cook at 180℃ for 5-6 minutes. The donuts are ready.
Transfer them to a mixing bowl and add in the cinnamon sugar along with the 2 tbsps of melted butter and give them a good mix.
Garnish with chocolate syrup and serve hot.