- Make sure that Parmesan is made in Italy in the Parma region. - Parmesan cheese must be made from cow's milk and must be refined for at least 12 months. - Avoid parmesans that look too pale or have cracks or holes. - Parmesan must have a firm and grainy texture. - Taste Parmesan cheese before buying it to make sure it has a good nut and dried fruit.