Preheat your air fryer to 375°F (190°C).
In a mixing bowl, combine flour, sugar, baking powder, and salt.
In another bowl, whisk together the egg, milk, and vanilla extract.
Pour the wet mixture into the dry ingredients and stir until just combined.
Use a piping bag or a ziplock bag with a corner snipped off to pipe the batter into the air fryer.
Cook for 5-7 minutes, checking for golden brown color.
Remove the bites from the fryer and dust with powdered sugar before serving.