Preheat your air fryer to 350°F.
In a mixing bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.
In a separate bowl, beat the buttermilk, egg, and vanilla extract together.
Combine the wet and dry ingredients, stirring until fully mixed.
Using a piping bag or a ziplock bag with the corner snipped off, pipe the batter into the donut molds in your air fryer.
Cook the donuts for 5-7 minutes or until a toothpick inserted comes out clean.
Let the donuts cool for a few minutes before adding your desired toppings and glazes.
