Freezing shredded mozzarella cheese for four hours should not significantly affect its freshness or quality. Cheese is generally tolerant of freezing temperatures and can withstand short periods in the freezer without major changes in taste or texture.
However, it's important to note that freezing and thawing can cause slight moisture changes in the cheese, which might affect its texture slightly. When you thaw the shredded mozzarella cheese, there might be some moisture released, resulting in a slightly different texture than fresh cheese. The cheese may become slightly softer or more crumbly after thawing.
To minimize any potential texture changes, it's recommended to thaw the shredded mozzarella cheese slowly in the refrigerator. Place it in a sealed container or resealable bag to prevent moisture loss or absorption from other foods in the fridge. Allow it to thaw overnight or for a few hours until it reaches the desired consistency.
Once thawed, you can use the shredded mozzarella cheese as you normally would, such as in recipes, toppings, or melting it on pizzas or pasta dishes. The taste and overall quality should still be satisfactory.
Remember that if you notice any significant changes in color, odor, or texture, or if the cheese has been frozen for an extended period, it's best to use your judgment and consider discarding it to ensure food safety.