Prepare the Dish:

Grease a 9x13-inch baking dish with butter or non-stick spray.

Make the Cinnamon-Sugar Mixture:

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

Melt the Butter and Marshmallows:

In a large saucepan over medium heat, melt the butter. Add the marshmallows and stir continuously until fully melted and smooth. Remove from heat and stir in the vanilla extract.

Add the Cereal:

Gradually fold the Rice Krispies cereal into the marshmallow mixture, stirring until the cereal is evenly coated.

Assemble the Treats:

Quickly press the mixture into the prepared baking dish using a spatula or lightly greased hands.

Sprinkle with Cinnamon-Sugar:

While the mixture is still warm, sprinkle the cinnamon-sugar mixture evenly over the top. Gently press it into the surface to ensure it sticks.

Cool and Slice:

Allow the treats to cool completely at room temperature before slicing into 24 bars.

Serve and Enjoy:

Serve as a snack or dessert for any churro lover!