Preheat your waffle maker according to the manufacturer's instructions and lightly grease it with oil spray.
In a large mixing bowl, whisk together the flour, baking powder, salt, cinnamon, and 1/2 cup sugar until combined.
In a separate bowl, mix the milk, egg, vanilla extract, and melted butter together until well combined.
Gradually add the wet ingredients to the dry ingredients and stir until just combined. Be careful not to overmix; it's okay if there are a few lumps.
Once the waffle maker is ready, pour a generous amount of the batter into the center of the waffle maker, spreading it slightly to ensure even cooking. Close the lid and cook for about 5-7 minutes or until golden brown and crisp.
Carefully remove the waffle and place it on a cutting board. Cut the waffle into sticks.
In a small bowl, combine the 1/4 cup sugar and 1 teaspoon cinnamon for the coating.
While the churro waffle sticks are still warm, roll them in the cinnamon-sugar mixture until fully coated.
Serve warm with chocolate or caramel sauce for dipping, if desired.
Notes
Serve warm with chocolate or caramel sauce for dipping.