In a medium saucepan, combine 1 cup of water, ½ cup of unsalted butter, and ¼ teaspoon of salt. Heat over medium-high until boiling and the butter has melted.

Remove from heat and quickly add 1 cup of all-purpose flour all at once. Stir vigorously until a sticky dough forms.

Transfer the dough to a mixing bowl and let it cool for approximately 5-10 minutes.

Add 3 large eggs to the slightly cooled dough one at a time, mixing well after each addition.

Pour in 1 teaspoon of vanilla extract and mix until fully combined.

Prepare your air fryer basket by lining it with parchment paper or spraying it lightly with cooking spray. Pipe the dough into 1-2 inch lengths.

Preheat the air fryer to 375°F (190°C) and place churro bites in a single layer. Air fry for 6-8 minutes until golden brown.

Remove churro bites and immediately toss in a mixture of ½ cup granulated sugar and 2 teaspoons ground cinnamon. Serve warm.