Follow these simple steps to create your delicious Churro Cupcakes:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and line a cupcake pan with paper liners.
2. Cream Butter and Sugar: In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy.
3. Add Eggs and Vanilla: Beat in the eggs, one at a time, followed by the vanilla extract. Make sure everything is well combined.
4. Mix Dry Ingredients: In another bowl, whisk together the flour, baking powder, baking soda, salt, and ground cinnamon.
5. Combine Mixtures: Gradually add the dry mixture to the wet mixture, alternating with the buttermilk. Mix until just combined; do not overmix.
6. Fill Cupcake Liners: Spoon the batter into the prepared cupcake liners, filling each about two-thirds full.
7. Bake: Place the cupcake pan in the preheated oven and bake for 20-25 minutes or until a toothpick inserted into the center comes out clean.
8. Cool: Remove the cupcakes from the oven and let them cool in the pan for about 10 minutes before transferring them to a wire rack to cool completely.
9. Prepare Cinnamon-Sugar Topping: In a small bowl, mix together the ¼ cup granulated sugar and 1 tablespoon ground cinnamon.
10. Coat Cupcakes: Once the cupcakes are completely cool, gently brush the tops with melted butter and dip them into the cinnamon-sugar mixture to coat.
11. Optional Chocolate Drizzle: If desired, drizzle melted chocolate over the tops for an elegant finishing touch.

These steps will guide you in creating these extraordinary Churro Cupcakes with ease.