Expiration & Storage Tips
When does grated parmesan cheese expire?
Unopened pre-packaged grated Parmesan cheese generally keeps for around 7 to 9 months in your pantry. However, the shelf-life varies depending on the date printed on the package so it's always a good idea to check it first. Once the package has been opened, you can expect the cheese to last for around 4 to 6 weeks if stored properly, ideally in the refrigeration. When frozen, grated Parmesan cheese can last for up to 18 months.
How do you tell if grated parmesan cheese is bad?
There are several signals to help detect if grated Parmesan cheese has gone bad. You should check for an off smell or a change in color. The overall texture may also change and become clumpy or slimy, which is a clear sign of spoilage. If a mold appears on the cheese, it means it has deteriorated and you should discard it.
Tips for storing grated parmesan cheese to extend shelf life
• Store grated parmesan cheese in the fridge right after you use it.
• If possible, keep the cheese in an airtight container. This will preserve its original flavor and prevent moisture from affecting the cheese.
• For long-term storage, consider freezing it. You can either store it in a freezer-safe bag or divide it into small portions and then freeze.
• If you freeze it, avoid defrosting and refreezing. Instead, remove only as much cheese as you need.
• Always use a clean utensil to handle the cheese to avoid cross-contamination.