Grated Parmesan cheese is a versatile and delicious ingredient that can elevate the flavor of numerous dishes. However, one common problem many people encounter is the mold growth that can occur on stored grated Parmesan cheese. In this article, we will explore several effective methods to keep grated Parmesan cheese from molding.

1. Proper Storage

The first and most crucial step in preventing mold growth on grated Parmesan cheese is proper storage. The ideal storage conditions for grated Parmesan cheese are:

  • Refrigeration: Always store grated Parmesan cheese in the refrigerator at a temperature between 34°F to 38°F (1°C to 3°C). The cold temperature slows down the growth of mold and bacteria.
  • Airtight Container: Transfer the grated Parmesan cheese into an airtight container or resealable bag before storing it in the refrigerator.

    This helps to keep moisture out and prevents exposure to air, which can accelerate mold growth.

  • Absorbent Material: Place a small piece of absorbent material, like a paper towel or cheesecloth, inside the container with the grated Parmesan cheese. This will help absorb excess moisture and maintain a dry environment.

2. Avoid Cross-Contamination

Cross-contamination is another factor that can contribute to mold growth on grated Parmesan cheese. Follow these tips to prevent cross-contamination:

  • Clean Utensils: Always use clean utensils when handling grated Parmesan cheese. Dirty utensils can introduce bacteria and mold spores into the container.
  • No Double-Dipping: Avoid double-dipping by using a clean spoon or measuring cup each time you take out grated Parmesan cheese.
  • Separate Storage: Store grated Parmesan cheese separately from other food items in the refrigerator. This prevents any potential cross-contamination from occurring.

3. Freeze for Long-Term Storage

If you have a large quantity of grated Parmesan cheese that you want to store for an extended period, freezing is an excellent option. Here’s how to freeze grated Parmesan cheese:

  • Portioning: Divide the grated Parmesan cheese into smaller portions that you will use at one time. This prevents the need to repeatedly thaw and refreeze the entire batch.
  • Airtight Freezer Bags: Place each portion of grated Parmesan cheese in a separate airtight freezer bag.

    Squeeze out any excess air before sealing the bags tightly.

  • Labeling and Dating: Label each bag with the date of freezing to keep track of its freshness. Frozen grated Parmesan cheese can be stored for up to six months.

4. Quality Cheese Matters

The quality of the grated Parmesan cheese you purchase can also impact its susceptibility to mold growth. Here are some tips when buying grated Parmesan cheese:

  • Freshness: Choose freshly grated Parmesan cheese whenever possible, as it tends to have a longer shelf life compared to pre-packaged options.
  • Packaging: Opt for vacuum-sealed or tightly sealed containers, as they provide better protection against moisture and air exposure.
  • Check Expiry Date: Always check the expiry date on the package to ensure you are purchasing Parmesan cheese with a longer shelf life.


By following these methods, you can keep your grated Parmesan cheese fresh and mold-free for an extended period. Remember to store it properly in the refrigerator, avoid cross-contamination, freeze when necessary, and choose high-quality cheese. Enjoy the rich and savory flavor of grated Parmesan cheese without any worries about mold!