Chop an orange peel and place it in a jar. Add the sugar. Seal the jar and give it a good mix. Let the sugar rest for at least 8 hours. Remove the peels and transfer the sugar to a large mixing bowl. Add the ground cinnamon and stir well.

Add oil to a medium-sized pot over medium-high heat. Let it heat for 1-2 minutes. Line a large heat-proof bowl or plate with paper towels

Gently lower 1-2 tortillas into the oil at a time. Let them fry for 10-15 seconds and then flip them over. Fry for another 5-10 seconds or until lightly golden brown and crispy. Repeat for all the tortillas.

Use kitchen tongs to remove the tortillas from the oil and set them on the lined plate to drain excess oil. Transfer 1 buñuelo at a time into the bowl with the aromatic sugar. Spoon the mixture over it until they're fully coated.

Let the buñuelos cool for 1-3 minutes and serve.