Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
In a medium saucepan, combine the water, butter, 1 tablespoon sugar, and salt. Bring it to a gentle boil.
Once boiling, stir in the flour all at once and mix vigorously with a wooden spoon until the dough forms a ball and pulls away from the sides.
Remove from heat. Let it cool for 5 minutes. Then add the eggs one at a time, mixing well after each. Stir in vanilla.
Transfer the dough to a piping bag fitted with a star tip. Pipe 1- to 2-inch pieces onto the baking sheet.
Bake for 20–25 minutes or until puffed and golden. Let them cool for a few minutes.
Toss the warm churro bites in a mixture of cinnamon and sugar until fully coated. Serve warm, preferably with melted chocolate.