Make cinnamon sugar mixture. Melt butter.
Use canned biscuits to make the donuts. You don’t flatten the biscuits at all. Cut out centers.
Butter your fryer insert.
Place 4 donuts inside and air fry at 330 degrees F.
Flip at 2 minutes, but bake total of 4 minutes.
Brush with melted butter.
Coat with cinnamon sugar mixture.
Enjoy warm!