Combine the yogurt and self-rising flour in a large bowl.
Transfer the dough onto your work surface and knead it until
it forms a cohesive mixture, ensuring there are no dry flour pockets. If the
dough feels sticky, incorporate 1 teaspoon of oil.
Divide the dough into 2 equal portions and shape each into a long log. Cut small pieces from the logs and roll each into balls using your hands.
Preheat the air fryer to 180°C.
Coat the doughnuts with melted butter and carefully place
them in the air fryer, leaving space for expansion.
Air fry the doughnuts for 5 minutes, noting that some uneven
browning may occur, which is typical with air fryers.
Immediately after air frying, coat the doughnuts in melted
butter and roll them in cinnamon sugar, ensuring the sugar adheres well with
the help of the butter.
Enjoy the warm doughnuts plain or with melted chocolate for
dipping or drizzling.
