Despite the name, it's not a soup at all; a popular Paraguayan legend says a cook for 19th-century president Carlos Antonio López added too much corn flour to his soup and baked the result.
A thick, moist cake of cornmeal, cheese, onion, and eggs, baked in large trays and sold by the slice at market stalls and roadside food stands across Misiones. It's eaten as a snack or side, never as a liquid soup.