How Long Can You Keep Fresh Pesto in the Refrigerator?

Fresh pesto can typically be stored in the refrigerator for about 5 to 7 days. To maximize its shelf life, store it in an airtight container and consider drizzling a thin layer of olive oil on top to help prevent oxidation. If you need to keep it longer, you can freeze pesto for up to 6 months.

While the initial preparation of pesto is fresh and vibrant, it is essential to use it as soon as possible. Store-bought pesto has a slightly different story. Once the seal is broken, it should be used within a week or so.

Maximizing Fresh Pesto's Shelf Life

Fresh pesto I can not comment on in general, but based on my personal experience, I believe the oil component allows it to last a little longer. For instance, when my flatmate’s girlfriend cleaned the fridge and threw out my premade purchased Pesto, I was told the reason was that it was green—simply because pesto is green.

When storing fresh pesto, ensure you pour additional olive oil on top to help prevent the development of mold. The presence of olive oil acts as a natural barrier against air and oxygen, which can cause the pesto to spoil faster. This method is similar to what you would do with tomato paste.

For maximum freshness, prepare the pesto in a clean, sterilized jar. Remove any air pockets inside the pesto by shaking the jar vertically against a hard surface and then horizontally. Cover the pesto with a layer of olive oil, about 1 inch over the pesto, and refrigerate the container to below 40 degrees Fahrenheit. In my experience, with proper sealing and care, pesto can easily last up to six months.

Proper Storage Techniques

Proper preparation with good quality olive oil is crucial. If stored correctly, you can even keep pesto in the refrigerator for several months. Airtight containers, however, may not preserve pesto for more than one week, even under ideal conditions.

Some have noted that pesto can actually be stored for much longer than expected. I have used pesto sauce that was more than 6 months old, and it was still fine. However, it is wise to test a small amount before deciding to discard the entire package.

Conclusion

The key to preserving your fresh pesto lies in the technique you use. Prepare it in a clean, sterilized jar, cover it with a layer of olive oil, and keep it refrigerated. By doing so, you can ensure that your pesto remains fresh and flavorful for a longer period. Whether you make small batches or store it for longer periods, proper storage techniques can help you enjoy this versatile sauce for much longer.