How Long Will Basil Keep In Olive Oil

Basil will keep in olive oil for about 2 to 4 months when stored properly in the refrigerator.
 
That’s the short answer, but the real question is how you prepare it.
 
If you’ve ever wondered how long will basil keep in olive oil, you’re not alone because this is a common kitchen question.
 
The truth is that the shelf life depends on freshness, moisture, and storage conditions.
 
In this post, we’ll break down how long basil keeps in olive oil, the best ways to extend its lifespan, and safety tips you need to know.
 
Let’s dive into the details so you can enjoy your basil without worry.
 

How Long Will Basil Keep in Olive Oil?

Basil will keep in olive oil for roughly 2 to 4 months in the fridge, but only if you remove excess moisture first.
 
The biggest culprit for spoilage is water because basil leaves are naturally damp when washed.
 
When you combine wet basil with oil, you create the perfect environment for botulism bacteria to grow.
 
So, how long does basil keep in olive oil?
 
It really comes down to how dry the leaves are before you submerge them.
 
If you skip the drying step, your basil may only keep in olive oil for a few days or a week.
 
But with proper technique, you can push that window to several months.
 
Let’s look at the factors that determine how long basil keeps in olive oil.
 

1. Moisture Is the Enemy

The number one reason basil goes bad in olive oil is trapped water.
 
Even tiny droplets on the leaves can harbor harmful bacteria.
 
To get basil to keep in olive oil for months, you must pat the leaves completely dry.
 
Use a salad spinner first, then lay the leaves on a clean towel and blot them.
 
The drier the leaves, the longer your basil will keep in olive oil.
 

2. Freshness of the Basil

Older basil starts to wilt and break down faster.
 
If you’re starting with wilted leaves, your basil won’t keep in olive oil as long.
 
Use bright, vibrant, and crisp leaves for the best results.
 
Fresh basil has lower microbial loads, which helps extend the shelf life.
 

3. Oil Quality and Type

Extra virgin olive oil has a shorter shelf life than refined oils, but it offers better flavor.
 
High-quality olive oil can turn rancid over time, which affects how long basil keeps in olive oil.
 
Make sure the oil completely covers the basil to prevent air exposure.
 
Air promotes oxidation, which spoils both the oil and the herb.
 

Best Practices for Storing Basil in Olive Oil

If you want your basil to keep in olive oil for the full 2 to 4 months, follow these steps.
 
This process is simple but requires attention to detail.
 

1. Dry the Basil Thoroughly

Wash the basil under cold water and remove any damaged leaves.
 
Spin dry in a salad spinner, then blot each leaf with a paper towel.
 
This step is non-negotiable for long-term storage.
 
Wet basil will ruin your batch quickly.
 

2. Pack the Basil in a Clean Jar

Use a sterilized glass jar with a tight-fitting lid.
 
Layer the basil leaves and pour olive oil over them.
 
Make sure the basil is fully submerged to avoid mold.
 
Leave about half an inch of headspace at the top.
 

3. Store in the Fridge, Not the Counter

Room temperature storage is risky for homemade basil in olive oil.
 
The refrigerator slows bacterial growth and keeps the basil fresher longer.
 
If you want basil to keep in olive oil beyond a few days, refrigeration is a must.
 

4. Use an Ice Cube Tray for Portions

Another excellent method is to freeze basil in olive oil using ice cube trays.
 
Chop the basil finely, pack it into the trays, and pour oil over each cube.
 
Freeze until solid, then pop the cubes into a freezer bag.
 
This method lets basil keep in olive oil for up to 6 months in the freezer.
 

Signs Your Basil in Olive Oil Has Gone Bad

Even with the best practices, you need to check for spoilage regularly.
 
How long basil will keep in olive oil doesn’t matter if you can’t tell when it’s unsafe.
 

1. Cloudy or Bubbly Liquid

If the oil looks cloudy or has bubbles rising, that’s a warning sign.
 
This could indicate fermentation or bacterial activity.
 
When you see this, discard the entire batch immediately.
 

2. Off Smell or Slimy Texture

Fresh basil in olive oil smells herbal and bright.
 
If you detect a sour, musty, or rancid odor, it’s past its prime.
 
Slimy leaves or a sticky film on the jar also mean spoilage.
 

3. Mold Growth

Any visible mold on the surface or between leaves is a red flag.
 
Mold can produce toxins, so never scrape it off and keep the rest.
 
When in doubt, throw it out.
 

How to Use Basil Stored in Olive Oil

Once you know how long basil will keep in olive oil, you need ideas to use it.
 
This mixture is perfect for cooking and dressing dishes.
 

1. Pasta and Pizza Toppings

Drizzle the basil-infused oil over hot pasta or pizza.
 
The oil carries the herb’s essence and adds richness to any dish.
 
This is a quick way to elevate a simple meal.
 

2. Salad Dressings and Marinades

Use the oil as a base for vinaigrettes or meat marinades.
 
It combines beautifully with garlic, lemon, and balsamic vinegar.
 
You’ll get both the flavor of basil and the goodness of olive oil.
 

3. Dipping Bread

Serve the basil oil in a small bowl with crusty bread.
 
Add a pinch of salt and pepper to bring out the flavors.
 
This is a simple appetizer that’s sure to impress.
 

So, How Long Will Basil Keep in Olive Oil?

Basil will keep in olive oil for about 2 to 4 months when stored in the fridge with completely dry leaves.
 
That’s the sweet spot for flavor and safety.
 
If you freeze it in cubes, basil keeps in olive oil for up to twice as long.
 
Always remember that moisture is your biggest risk.
 
Dry your basil well, submerge it fully, and refrigerate immediately.
 
Check for signs of spoilage before every use.
 
Hope this helps you answer the question of how long basil will keep in olive oil.
 
Enjoy your homemade basil oil and the vibrant taste it brings to your cooking.