Mix the first 4 ingredients in a pan, bring to a boil, stirring constantly.
Add flour and continue to mix thoroughly. Remove from heat and continue to mix until smooth and the dough comes away from the side of the pan.
Add eggs one at a time, mix until smooth. Set aside to cool.
Preheat Air Fryer to 400F/200C.
Fill a cake decorator bag with dough and add a ½-inch star tip.
Create sticks that are 3-4 inches in length by pushing the dough out of the bag onto a parchment paper. You can then transfer straight to the air fryer if you’re ready for them. If the dough is difficult to handle, place in the fridge for 30 minutes to firm up.
Spray air fryer basket or tray with coconut oil or cooking spray.
Add about 8-10 churros in air fryer basket or tray. Spritz with oil.
Cook on 400F/200C (french fry setting) for 5 minutes.
Once done and while still warm, roll in cinnamon sugar mixture, cinnamon or regular sugar.