Indulge in sweet and fluffy cinnamon sugar donuts made in the Instant Vortex Air Fryer. Start by preparing a simple donut dough with flour, sugar, baking powder, milk, and melted butter. Shape the dough into small donuts and place them in the air fryer basket. Cook at 350°F for 8-10 minutes until golden brown. Toss the donuts in cinnamon sugar while they are still warm for a delightful treat.