How Long Will Pesto Last in the Refrigerator?

Pesto is a beloved Italian sauce known for its aromatic blend of basil, garlic, pine nuts, Parmesan cheese, and olive oil. Whether you've made a fresh batch at home or purchased it from the store, knowing how long pesto will last in the refrigerator is key to enjoying this delightful condiment safely and at its best.

Understanding Pesto's Shelf Life

The shelf life of pesto can vary depending on factors such as its preparation and storage conditions. Below are the typical guidelines for how long pesto can last in the refrigerator:

1. Homemade Pesto

Homemade pesto tends to have a shorter shelf life compared to store-bought varieties because it usually lacks preservatives. When stored properly:

• Fresh Homemade Pesto: Can last 5 to 7 days in the refrigerator.

Storage Tips for Homemade Pesto:

• Use an Airtight Container: This helps prevent oxidation and moisture loss.
• Add a Layer of Oil: Pour a thin layer of olive oil on top of the pesto to create a protective barrier against air exposure.

2. Store-Bought Pesto

Store-bought pesto generally contains preservatives that extend its shelf life. Here’s what you can expect:

• Unopened Jar: Can last until the "Best By" date on the label when kept in the refrigerator.
• Opened Jar: Usually stays fresh for 7 to 14 days once opened and refrigerated.

Note: Always check the label instructions, as these can vary between brands.

How to Tell If Pesto Has Gone Bad

Ensuring food safety is crucial. To determine if your pesto is still good to use, look for these signs:

Visual Changes

• Color: Fresh pesto is green. If it turns dark green or brownish, it may be time to discard it.
• Mold: Any presence of mold is a clear sign that the pesto should not be consumed.

Smell and Taste

• Off-Odor: If the pesto emits a sour or rancid smell, it’s likely spoiled.
• Strange Taste: A bitter or unpleasant taste indicates the pesto has gone bad.

Texture

• Separation: Some separation of oil and solids can be normal. Mix well before judging.
• Slime: A slimy texture is a sign that the pesto is no longer good.

Table: Quick Reference Guide for Pesto Shelf Life

Here’s a quick reference table to help you determine the shelf life of pesto:

Best Practices for Storing Pesto

Implement these tips to extend the life of your pesto and keep it fresh:

• Freezing: If you don't plan to use the pesto within the recommended time, you can freeze it. Portion the pesto into ice cube trays and transfer the frozen cubes to a freezer bag for easy use.
• Keep It Cold: Always return pesto to the refrigerator promptly after use.
• Avoid Cross-Contamination: Use a clean spoon or utensil each time you scoop out pesto to minimize bacterial growth.

By following these guidelines, you can ensure your pesto remains fresh and safe for consumption. Whether you're adding it to pasta, spreading it on sandwiches, or using it as a marinade, proper storage is essential to get the most out of this versatile sauce.