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You can preserve Thai basil in oil, and it’s one of the best ways to keep that bright, peppery flavor alive for months.
Preserving Thai basil in oil locks in the aromatic oils that make this herb so special, and it’s surprisingly easy to do right at home.
If you’ve ever wondered whether you can preserve Thai basil in oil without losing its punch, the short answer is yes, as long as you follow a few food safety rules.
In this post, we’ll walk through the best methods to preserve Thai basil in oil, what to watch out for, and how to use your preserved basil so nothing goes to waste.
Let’s dig into the fragrant world of Thai basil and get you set up for success.
Why You Should Preserve Thai Basil In Oil
Preserving Thai basil in oil isn’t just about saving a bunch of herbs from wilting in the fridge, it’s about capturing summer in a jar.
The flavor of Thai basil is more intense than sweet basil, with hints of anise and licorice, and oil is the perfect carrier to keep that flavor locked in.
When you preserve Thai basil in oil, you’re creating a ready-to-use ingredient that can elevate stir-fries, dressings, marinades, and even simple roasted vegetables.
Plus, it’s a fantastic way to reduce food waste if you’ve grown more basil than you can use fresh.
But before you go pouring oil over fresh leaves, there’s a critical step you need to know about, and it’s all about moisture.
1. The Moisture Problem When You Preserve Thai Basil In Oil
The biggest mistake people make when they try to preserve Thai basil in oil is skipping the drying step.
Fresh basil leaves are full of water, and when water meets oil in a closed jar, you create a breeding ground for bacteria, specifically botulism.
That’s why it’s unsafe to just chop wet leaves and submerge them in oil, even if you refrigerate everything.
To safely preserve Thai basil in oil, you need to remove as much moisture as possible from the leaves first.
You can do this by patting the leaves dry with a clean kitchen towel, then leaving them out on a paper towel for an hour or two to air dry completely.
Some folks even use a salad spinner, then lay the leaves out overnight to ensure they’re bone dry before the oil ever touches them.
This step alone makes your preserved Thai basil in oil both safer and longer-lasting.
2. Choose the Right Oil for Preserving Thai Basil In Oil
The type of oil you use matters more than you might think when you preserve Thai basil in oil.
Olive oil is a popular choice for its robust flavor, but extra virgin olive oil can turn bitter if stored for a long time.
A lighter olive oil or a neutral oil like grapeseed or avocado oil works beautifully because it lets the basil shine without competing flavors.
If you want a more authentic Asian twist, you can use a mild sesame oil, but remember that sesame oil has a lower smoke point and a stronger taste, so it’s best for shorter-term storage.
No matter which oil you pick, always choose a high-quality, fresh oil because the oil will be the main carrier of flavor once you’ve preserved your Thai basil in oil.
3. Freeze vs. Refrigerate for Preserving Thai Basil In Oil
There are two main paths to preserve Thai basil in oil, and each one works well depending on how quickly you plan to use it.
Refrigerated Thai basil in oil is great for short-term use, meaning you’ll go through the jar within two to three weeks.
For this method, simply blend your dried basil with oil into a paste or keep whole leaves submerged, press out air bubbles, and top with a little extra oil to fully cover the basil.
Frozen Thai basil in oil is the better choice for long-term storage, and it’s incredibly convenient because you can portion it into ice cube trays.
Fill each cube with chopped basil and oil, freeze until solid, then pop the cubes into a freezer bag for up to six months.
When you’re ready to cook, just toss a frozen cube of Thai basil in oil straight into your pan for instant flavor.
Step-by-Step Guide to Preserve Thai Basil In Oil
Now that you know the why and the oil choices, let’s get down to the actual process so you can preserve Thai basil in oil with confidence.
The steps below work for both the refrigerator and freezer methods.
1. Harvest and Clean Your Thai Basil
Start by picking fresh Thai basil leaves from the stems, and give them a gentle rinse in cold water to remove dirt and any tiny insects.
Shake off excess water, then lay the leaves on a clean kitchen towel or paper towels in a single layer.
Leave them out for at least two hours, flipping once, until the leaves feel completely dry and slightly wilted.
This wilting isn’t bad, it actually concentrates the flavor and makes the leaves more pliable for packing into jars.
2. Chop or Leave Whole
For a paste-like preserve, chop your dried Thai basil leaves finely with a knife or pulse them in a food processor.
For a more rustic look, you can leave the leaves whole, especially if you’re going to freeze them in oil.
If you’re making a paste, add a pinch of salt to the basil before blending, as salt acts as a natural preservative and enhances the taste.
Then, with the processor running, drizzle in your chosen oil until you get the consistency you like, you can go thick like pesto or a bit looser.
3. Pack Into Clean Jars or Trays
Spoon your Thai basil oil mixture into small, sterilized glass jars for fridge storage, and make sure you push out any trapped air pockets with a spatula.
For freezer storage, spoon the mixture into ice cube trays, filling each well about three-quarters full.
After filling, pour a thin layer of oil over the top of each cube to seal it completely, which helps prevent freezer burn.
Always leave a little headspace in jars because oil expands slightly when it gets cold.
4. Store with a Label and a Date
Write the date and the type of basil on each jar or bag, because trust me, you’ll forget which is which in a month.
Refrigerated Thai basil in oil will keep for up to three weeks, but always check for any signs of mold or off smells before using.
Frozen Thai basil in oil cubes will hold their quality for about six months, and they’re the ultimate convenience for quick weeknight meals.
Creative Ways to Use Preserved Thai Basil In Oil
Once you’ve learned how to preserve Thai basil in oil, the fun part begins, figuring out all the tasty ways to use it.
A spoonful of the oil can be used to start a stir-fry, adding instant basil flavor to chicken, shrimp, or tofu.
You can whisk the flavored oil with a little vinegar and fish sauce for a quick Asian salad dressing.
Drizzle the oil over steamed rice or noodles, and you’ll instantly transform a plain side dish into something special.
For pizza or flatbread, brush the basil oil on the dough before adding toppings for a fragrant, herby base.
And if you’re a fan of dipping sauces, mix some preserved Thai basil in oil with soy sauce and chili flakes for a killer dip for spring rolls.
1. Boost Soups and Curries
Add a spoonful of Thai basil oil to hot soups or curries right at the end of cooking for a fresh, vibrant finish.
The heat will awaken the aromatic compounds in the basil, and the oil will add a lovely richness to the broth.
This is one of the easiest ways to use your preserved Thai basil in oil because it requires zero extra effort.
2. Make Garlic Bread or Bruschetta
Mix some preserved Thai basil in oil with softened butter and minced garlic to make a compound butter for garlic bread.
Spread it on slices of baguette and toast until golden and crisp, and you’ll have a snack that disappears fast.
You can also skip the butter and just brush the basil oil onto bread before toasting for a lighter, dairy-free option.
Top that toast with fresh tomatoes and a little salt for a beautiful bruschetta with a Thai twist.
3. Marinate Meats or Seafood
Use the Thai basil oil as a base for a marinade, mixing it with lime juice, garlic, and a little honey for sweetness.
Marinate chicken thighs or shrimp for at least thirty minutes before grilling, and the basil oil will keep everything juicy and flavorful.
The oil also helps prevent sticking on the grill, so you get nicely charred pieces without any tearing.
It’s a fantastic way to use up a big batch if you’ve preserved Thai basil in oil in larger quantities.
So, Can You Preserve Thai Basil In Oil Safely?
Yes, you absolutely can preserve Thai basil in oil, but only if you remove moisture and store it properly.
The key takeaway is that dried leaves, quality oil, and the fridge or freezer are your best friends in this process.
You can preserve Thai basil in oil for short bursts in the refrigerator, or you can preserve Thai basil in oil cubes in the freezer for months of easy flavor.
The method you choose all comes down to how soon you’ll use it and how much space you have.
We hope this guide has shown you how simple and rewarding it is to preserve Thai basil in oil, and we can’t wait for you to taste the difference.
Get your jars and oil ready, and go preserve that fragrant Thai basil in oil today.