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How Long Does Infused Olive Oil Last?

Bryan, May 25, 2023

Infused olive oil, a cornerstone of the culinary world, is celebrated for its rich flavor profiles and versatility in the kitchen. By incorporating herbs, spices, fruits, or vegetables, olive oil is transformed into a powerhouse of taste and aroma, enhancing dishes in extraordinary ways. Nevertheless, the primary question often asked by both culinary enthusiasts and novices is: "How long does infused olive oil last?" To shed light on this topic, we'll delve into the shelf life of infused olive oil, along with some handy tips to ensure maximum freshness and taste.


Shelf Life of Infused Olive Oil


Unlike pure olive oil, which can last up to two years if stored correctly, infused olive oil has a significantly reduced shelf life due to the perishable ingredients used for infusion. On average, homemade infused olive oil should ideally be used within one to two weeks if refrigerated, although some may last a bit longer, up to a month. Commercially prepared infused olive oils usually last longer due to the use of specific preservation processes, potentially extending the shelf life to a few months or even a year.


The short lifespan of homemade infused olive oil is primarily due to the risk of botulism, a severe form of food poisoning. Fresh ingredients such as garlic, herbs, and vegetables can contain spores of Clostridium botulinum, the bacterium causing botulism, which can thrive in low-oxygen environments like a bottle of oil.


How to Increase the Shelf Life of Infused Olive Oil


Here are some steps you can take to help extend the life of your infused olive oil:


1. Use Dried Ingredients: Dried herbs and spices are less likely to harbor bacteria, therefore reducing the risk of botulism. They can also extend the shelf life of your oil infusion by several months, provided they're properly stored.


2. Acidification: Adding an acid like vinegar or citric acid to ingredients before infusing them in oil can reduce the risk of bacterial growth. Note that this may affect the taste of your infusion.


3. Proper Storage: Infused olive oil should be stored in a cool, dark place to maintain its freshness. Heat, light, and oxygen exposure can significantly degrade the oil and hasten spoilage.


4. Refrigeration: While pure olive oil doesn't require refrigeration, infused olive oil does. Cold temperatures can help slow down the rate of bacterial growth.


5. Use Quality Olive Oil: Start with a high-quality extra-virgin olive oil. It has a longer shelf life and is loaded with antioxidants, which can help to preserve the infusion.


Recognizing Spoiled Infused Olive Oil


Knowing when your infused olive oil has gone bad is crucial. Indications include a rancid or off smell, a change in color, or a greasy or thickened texture. The presence of mold or any other foreign particles is a clear sign that the oil has spoiled and should not be consumed.


While infused olive oil provides a fantastic opportunity to experiment with flavors, it's essential to be mindful of its relatively short shelf life. Proper understanding of infused oil storage and signs of spoilage is crucial for safety. While homemade infusions provide the pleasure of customization, commercially prepared infused oils offer convenience and a longer shelf life due to industrial preservation techniques. Either way, infused olive oils are a delightful addition to any kitchen.