In a large mixing bowl sift or whisk together all the dry ingredients until there are no lumps
Stir in the eggs until all the dry ingredients are moistened. Add the butter and stir until fully combined. Stir in the yogurt and vanilla until fully combined and a smooth dough has formed
Form dough into a ball and massage for 1 minute to absorb excess moisture. Form back into ball and place back into mixing bowl. Place in the refrigerator and chill 10 minutes to firm up the dough
Line a clean worksurface with parchment paper. Remove from the refrigerator. Scoop the dough out 2 tablespoons at a time and roll into a smooth tight ball. Make sure there are no cracks in the ball. Place onto prepared lined worksurface
Pre heat air fryer to 350 degrees for 3 minutes or according to manufacture directions
Spray the bottom of the air fryer basket or drawer with cooking spray. Place the dough balls in a single layer in the prepared air fryer basket or drawer. Make sure the dough balls are slightly spaced in the air fryer.
Air fry at 350 degrees for 6 minutes or until golden. Check at 3 minutes to make sure they are not sticking.
Once cooked open the fryer drawer or basket. DO NOT REMOVE THE DOUGHNUT HOLES. The doughnut holes will be very soft but will firm as they cool. Allow the doughnut holes to cool in the air fryer drawer or basket for about 5 minutes or until they can be easily removed
Transfer to a wire rack and allow to firm up for another 5 minutes before putting on the glaze