01 -
Preheat the air fryer to 340°F and spray the basket with a nonstick spray.
02 -
Using a bottle cap, large piping tip, or free hand with a paring knife, cut circles out of the center of each raw biscuit.
03 -
Brush the top of each biscuit with melted butter and place into the basket about 2 inches apart. Make several batches if necessary to avoid overcrowding, as they will rise. Cook for 6 minutes and set aside on parchment paper or another non-stick surface.
04 -
Place each color of icing into a separate microwave-safe bowl and microwave in 30-second intervals until melted and smooth when stirred. Stir one tablespoon of milk into each bowl to thin the icing slightly.
05 -
Dip the top of each cooked donut into the icing and set it back on the parchment paper. Decorate the donuts before the icing sets using sprinkles or decorations as desired.