In a small bowl, mix together the sugar and cinnamon until well combined. This mixture will be used to coat the churros and give them their signature sweet and spicy flavor.

Open the can of crescent roll dough and unroll it onto a clean work surface. If the dough is perforated to make crescent rolls, press the perforations together to seal them and form one large sheet of dough.

With a pizza cutter or a sharp knife, cut the dough into strips about 1/2 inch wide. You can make them as long or as short as you like, depending on your preference.

Take each strip of dough and twist it a few times to create the churro shape. The twisting action is not only for aesthetics but also helps create more texture and surface area for the cinnamon sugar to adhere to.

Place the twisted dough strips in the air fryer basket, making sure they are not touching to allow for proper air circulation. Depending on the size of your air fryer, you may need to cook them in batches.

Air fry the churros for about 6-8 minutes or until they are golden brown and cooked through. The exact time may vary depending on your air fryer model, so it's a good idea to start checking them around the 6-minute mark.

Once the churros are cooked, brush them with the melted butter while they're still warm. Then, immediately toss them in the cinnamon sugar mixture until they are well coated. The warmth of the churros will help the sugar mixture stick, creating a deliciously sweet crust.

Serve the air fryer crescent churros warm, with chocolate sauce on the side for dipping if desired. They are best enjoyed fresh but can also be stored in an airtight container for a day or two, though they may lose some of their crispiness.