The phrase "cup mozzarella" means a specific amount or measurement of the cheese called mozzarella. It refers to one cup, which is a container unit used for measuring ingredients in cooking. Full definition
Combine all ingredients except for 1/2 cup mozzarella cheese in a microwave - safe bowl. (dizzybusyandhungry.com)
Set aside the remaining 1 cup mozzarella in the refrigerator. (eatingwell.com)
Sprinkle remaining 1 cup mozzarella over top of dip and bake an additional 5 minutes or until heated through and cheese is melted. (mostlyhomemademom.com)