Romano vs Parmesan in Cacio e Pepe?
The difference between Pecorino Romano and Parmiggiano Reggiano (Parmesan) is that the first is made from sheep milk, the last from cow milk.I think this is the reason that they behave so differently, because they are made from milk of very different animals.The closest type of cheese to the pecorino romano might be the pecorino sardo.