Mozzarella

Today, mozzarella is made from cow's and buffalo's milk.

An excerpt from the article 16 facts about Mozzarella
In addition to cheeses made from buffalo milk alone or cow's milk alone, you can make cheese from blended milk. In this case, producers are required to specify the percentage of milk used in production. Although these are niche productions, mozzarella with sheep's milk (pecorino) and rarely with goat's milk also happen.