Feta cheese: blue or not? the secrets revealed

Feta cheese, a beloved Mediterranean staple, is renowned for its crumbly texture, salty flavor, and distinct white color. However, under certain circumstances, feta cheese may develop a bluish hue, raising concerns about its edibility and safety. In this comprehensive guide, we will explore the fascinating world of feta cheese discoloration, answering the question: does feta cheese turn blue?

Understanding the Science of Cheese Discoloration

To understand why feta cheese may turn blue, we must delve into the intricate science of cheesemaking. Cheese is essentially a fermented dairy product, and during this fermentation process, bacteria and molds play crucial roles in developing the cheese’s unique characteristics.

In the case of feta cheese, the primary bacteria responsible for its fermentation are lactic acid bacteria. These bacteria consume the lactose in the milk, producing lactic acid as a byproduct. This acidification process lowers the pH of the cheese, creating an environment that inhibits the growth of most bacteria.

However, some molds, such as Penicillium roqueforti, are able to thrive in these acidic conditions. Penicillium roqueforti is the same mold used to produce blue cheeses like Roquefort and Gorgonzola.

Why Does Feta Cheese Sometimes Turn Blue?

Under certain conditions, Penicillium roqueforti can find its way into feta cheese. This can occur during the cheesemaking process, or it can happen later on if the cheese is not properly stored.

When Penicillium roqueforti grows in feta cheese, it produces enzymes that break down the fats and proteins in the cheese. This breakdown process creates the characteristic blue veins and spots that are associated with blue cheeses.

Is Blue Feta Cheese Safe to Eat?

The presence of Penicillium roqueforti in feta cheese does not necessarily mean that the cheese is unsafe to eat. In fact, blue cheeses are highly prized for their unique flavor and texture.

However, it is important to note that some people may be allergic to Penicillium roqueforti. If you have any concerns about eating blue feta cheese, it is always best to consult with your healthcare provider.

How to Prevent Feta Cheese from Turning Blue

If you want to prevent your feta cheese from turning blue, there are a few steps you can take:

• Store the cheese properly. Feta cheese should be stored in the refrigerator at a temperature of 40-45 degrees Fahrenheit.
• Use airtight containers. When storing feta cheese, make sure to use airtight containers to prevent the cheese from coming into contact with air.
• Avoid cross-contamination. If you are handling blue cheese, make sure to wash your hands thoroughly before handling feta cheese.
• Inspect the cheese before eating. Before eating feta cheese, always inspect it for any signs of discoloration. If you see any blue spots or veins, it is best to discard the cheese.

Other Causes of Feta Cheese Discoloration

In addition to Penicillium roqueforti, there are a few other factors that can cause feta cheese to change color. These include:

• Exposure to light. Feta cheese that is exposed to light for extended periods may develop a yellowish or brownish hue.
• Oxidation. Feta cheese that is exposed to oxygen may also develop a brownish color.
• Spoilage. If feta cheese is not stored properly, it may spoil and develop a variety of off-colors, including green, black, and pink.

When to Discard Feta Cheese

If you are unsure whether your feta cheese is still safe to eat, it is always best to err on the side of caution and discard it. Here are some signs that your feta cheese has gone bad:

• Off-color. Any feta cheese that has developed an off-color, such as blue, green, black, or pink, should be discarded.
• Mold. If you see any mold growing on your feta cheese, discard it immediately.
• Sour smell. Feta cheese that has gone bad will have a sour or unpleasant smell.
• Slimy texture. Feta cheese that has gone bad will have a slimy or sticky texture.

In a nutshell: Understanding Feta Cheese Discoloration

Feta cheese may turn blue due to the presence of Penicillium roqueforti, the same mold used to produce blue cheeses. While blue feta cheese is not necessarily unsafe to eat, it is important to be aware of the potential for discoloration and to take steps to prevent it. By storing feta cheese properly and inspecting it before eating, you can enjoy this delicious and versatile cheese without any worries.

Information You Need to Know

1. Is it safe to eat blue feta cheese?

Yes, blue feta cheese is safe to eat for most people. However, some people may be allergic to Penicillium roqueforti, the mold that causes the blue color.

2. How do I prevent feta cheese from turning blue?

You can prevent feta cheese from turning blue by storing it properly in the refrigerator in an airtight container.

3. What other factors can cause feta cheese to change color?

Feta cheese may also change color due to exposure to light, oxidation, or spoilage.

4. When should I discard feta cheese?

You should discard feta cheese if it has developed an off-color, mold, a sour smell, or a slimy texture.

5. What are the benefits of eating feta cheese?

Feta cheese is a good source of protein, calcium, and vitamins. It is also a versatile cheese that can be used in a variety of dishes.