Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper and spray lightly with non-stick spray.
In a saucepan over medium heat, combine water, butter, sugar, and salt. Stir until butter is melted and the mixture just begins to boil.
Reduce heat and stir in flour with a wooden spoon until it forms a ball and pulls away from the sides of the pan.
Remove from heat and let it cool for 5 minutes. Add eggs one at a time, beating well after each addition until smooth.
Transfer dough to a piping bag fitted with a large star tip. Pipe 1.5-inch pieces onto the baking sheet.
Bake for 10–12 minutes or until puffed and golden.
In a bowl, mix cinnamon and sugar. While churro bites are still warm, toss them in the cinnamon sugar to coat.
Serve warm. Maybe with a little chocolate sauce on the side if you’re feeling extra.