01 - In a large bowl, thoroughly blend the all-purpose flour, granulated sugar, baking powder, ground cinnamon, and salt.
02 - In a separate bowl, whisk together milk, egg, melted butter, and vanilla extract until fully incorporated.
03 - Gradually add the wet ingredients to the dry mixture, stirring gently until a thick, smooth batter develops.
04 - Using a small cookie scoop or spoon, form smooth 1-inch balls of batter and set aside.
05 - Preheat the air fryer to 350°F and lightly grease the basket with cooking spray or oil.
06 - Place formed balls in the air fryer basket in a single layer without overcrowding. Air fry for 7 to 9 minutes or until golden and fully cooked.
07 - While the bites are still warm, gently brush each with the melted butter.
08 - Toss the buttered bites immediately in the cinnamon-sugar mixture, ensuring a uniform coating.
09 - Arrange on a plate and serve warm. Optionally accompany with chocolate or caramel sauce.