Cut angel food cake into one inch cubes. They don't need to look perfect.
Heat 1 1/2 inches of oil in a heavy bottom pot over medium heat to 360 degrees. Keep a close eye on the temperature to make sure it says between 350 and 375 degrees. You may need to remove from heat for a few seconds if it starts to get too hot.
Drop pieces of angel food cake into the oil in 5-10 churro increments. Allow to fry until golden brown, about 7 seconds on each side. Watch carefully and flip over to make sure all sides are cooked evenly. Remove from oil and place on a paper-towel covered plate to drain.
When all churros are cooked, combine granulated sugar and cinnamon together in a medium bowl. Toss warm churros in mixture to coat evenly.
Serve with a scoop of vanilla ice cream, hot fudge or just by themselves!