What is a ChurWaffle, the signature product of twin brothers, food entrepreneurs and public servants Jonathan and Matthew Burgess (a firefighter and a law enforcement officer, respectively)? One might expect it to be something between a churro and a waffle and the original, baked in the Burgesses’ trademarked ChurWaffle iron and tossed in cinnamon sugar, bears a resemblance to both. But the ChurWaffle in practice is something broader and more ambitious. The ChurWaffle mix, inspired by the brothers’ grandmother’s cornbread, has made its way from Sacramento into fritters and black bean corn cakes in the dining halls of Harvard University.