Parmesan Cheese
Parmesan Cheese has the most calories [420 calories per 100 g].
More information:
Cheese is a dairy product produced in a variety of flavors, textures and forms. It contains protein and fat from milk, usually cow's milk, buffalo, goat's, or sheep's milk.
Here is rank of types of Cheese having highest calories to lower and so on.
See list from [link]