Spray a baking sheet with olive oil spray, or line it with wax paper.

In a saucepan, add the water, butter, sugar, and salt. Bring to a slow simmer.

Continue to simmer and then add flour to the saucepan.

Stir constantly with a rubber spatula and cook until the dough comes together and is smooth.

Remove the dough from the stove and place the dough into a mixing bowl. Let excellent for about 5 minutes.

Mix the eggs and vanilla extract using an electric hand mixer or mix until the dough forms.

Place the dough into a piping bag.

Pipe churros onto the baking sheet into 4 to 5-inch lengths.

Refrigerate the churros until cold and solid, about an hour.

Place the cold churros into a greased air fryer basket. Being careful not to overcrowd the basket.

Air fry at 375 degrees F for 10-12 minutes until golden brown.

In a small bowl, mix the sugar and ground cinnamon.

When the churros are done air frying, coat them with the sugar/cinnamon mixture.

Optional: Serve warm with Nutella or chocolate dipping sauce.

Plate, serve, and enjoy!