In a large bowl, combine the flour, sugar, baking powder, and salt.
Add the yogurt and milk and combine with a spoon.
Gently bring the dough together into a ball with your hands, avoiding any kneading. The dough will be very soft; if it feels too sticky, add a small amount of flour as needed.
Divide the dough into equal portions and roll each one into a small ball*.
Preheat the air fryer to 350°F (180°C)**. Place the dough balls inside and lightly spray them with oil.
Cook for 10 - 12 minutes, or until the dough balls are lightly golden***.
Meanwhile, combine the sugar and cinnamon in a small bowl.
Melt the butter in a separate small bowl. Once cooked and while still warm, dunk the balls into the melted butter.
Then coat with sugar and cinnamon mixture. Enjoy!
