What To Know
- If the blue or green discoloration is isolated to small areas, it is likely safe to remove the affected portion and consume the rest of the cheese.
- The presence of blue or green discoloration on Parmesan cheese can be a natural part of the aging process or a sign of contamination.
- Store cheese in an airtight container in the refrigerator, use a cheese vacuumer, or wrap it in cheese paper.
Yes, Parmesan cheese can turn blue. However, this discoloration is not always a cause for concern and can be a natural part of the aging process. The presence of certain molds, bacteria, and enzymes can contribute to the development of blue or greenish hues in Parmesan cheese.
Causes of Blue Mold on Parmesan Cheese
Penicillium Roqueforti
This mold is responsible for the characteristic blue veins found in Roquefort cheese. When it contaminates Parmesan cheese, it can produce a similar blue or greenish discoloration.
Geotrichum Candidum
This mold is commonly found on the surface of soft cheeses. In Parmesan cheese, it can cause a white or bluish-gray coloration.
Bacteria
Certain bacteria, such as Pseudomonas and Flavobacterium, can produce blue or greenish pigments that can stain the cheese.
Enzymes
Enzymes within the cheese can break down proteins and fats, releasing compounds that can contribute to blue or green discoloration.
Is Blue Parmesan Cheese Safe to Eat?
In most cases, blue Parmesan cheese is safe to eat. The presence of mold does not necessarily indicate spoilage or contamination. However, it’s important to consider the following factors:
Type of Mold
Penicillium Roqueforti is a safe mold that is used in cheesemaking. Geotrichum Candidum is generally considered harmless. However, other molds can be harmful and should be avoided.
Extent of Discoloration
If the blue or green discoloration is isolated to small areas, it is likely safe to remove the affected portion and consume the rest of the cheese. However, if the discoloration is widespread, it may be best to discard the cheese.
Smell and Taste
If the cheese has an off-odor or a bitter taste, it should be discarded regardless of the presence of mold.
How to Prevent Blue Mold on Parmesan Cheese
Proper Storage
Store Parmesan cheese in an airtight container in the refrigerator. This will prevent moisture from entering and creating a favorable environment for mold growth.
Use a Cheese Vacuumer
A cheese vacuumer removes air from the packaging, which can help prevent mold formation.
Wrap in Cheese Paper
Cheese paper is designed to absorb moisture and prevent mold growth.
How to Remove Blue Mold from Parmesan Cheese
Cut Away the Affected Area
If the blue or green discoloration is isolated to a small area, you can remove it with a clean knife.
Brush the Surface
Use a soft brush to gently remove any surface mold.
Wipe with Vinegar
Wipe the affected area with a cloth dampened with white vinegar. Vinegar has antibacterial and antifungal properties.
The Bottom Line: Understanding Blue Mold on Parmesan Cheese
The presence of blue or green discoloration on Parmesan cheese can be a natural part of the aging process or a sign of contamination. By understanding the causes and safety considerations, you can make informed decisions about consuming blue Parmesan cheese. If you are unsure about the safety of your cheese, it is always best to discard it.
Popular Questions
Q: Is all blue Parmesan cheese safe to eat?
A: Most blue Parmesan cheese is safe to eat, but it’s important to consider the type of mold, extent of discoloration, and smell and taste.
Q: How can I prevent blue mold from forming on Parmesan cheese?
A: Store cheese in an airtight container in the refrigerator, use a cheese vacuumer, or wrap it in cheese paper.
Q: How do I remove blue mold from Parmesan cheese?
A: Cut away the affected area, brush the surface, or wipe with vinegar.
