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You can preserve lemon basil by drying, freezing, or turning it into oils and butters.
Each of these methods locks in that bright, citrusy flavor so you can enjoy your harvest long after the plant stops producing.
In this post, we’ll explore the best ways to preserve lemon basil, step-by-step tips for each technique, and how to store your preserved batches for maximum freshness.
Let’s dig in.
Why Preserve Lemon Basil
Preserving lemon basil is all about capturing that unique, lemony-sweet aroma and tender leaf texture.
Fresh lemon basil wilts within days in the fridge, so learning how to preserve lemon basil properly means you’ll have that zesty punch for salads, teas, and marinades all year.
The good news is that lemon basil responds beautifully to several preservation methods because its oils are highly aromatic and hold up well.
Once you know how to preserve lemon basil the right way, you’ll never waste another sprig again.
Let’s break down the most popular techniques.
How to Preserve Lemon Basil by Drying
Drying is one of the easiest and most traditional ways to preserve lemon basil, and it works great for your dried herb blends and spice rubs.
But there are a few tricks to get it right.
1. Air Drying Lemon Basil
To preserve lemon basil by air drying, start by washing the stems gently and patting them completely dry with a clean towel.
Any lingering moisture can cause mold during the drying process.
Bundle four to six stems together and tie them with kitchen twine, then hang them upside down in a warm, dry, dark room with good airflow.
This method is perfect if you want to preserve lemon basil naturally without any extra equipment, and it takes about one to two weeks.
Once the leaves crumble easily between your fingers, you know they’re fully dry.
2. Oven or Dehydrator Drying
If you want to preserve lemon basil faster, use a dehydrator set to its lowest setting around 95°F to 115°F.
Spread the leaves in a single layer on the trays and let them dry for a few hours until they’re crispy.
You can also use your oven at the lowest possible temperature with the door cracked open, but be careful because high heat can burn the delicate oils.
When you preserve lemon basil using a dehydrator, you keep more of the green color and volatile flavor compounds compared to air drying in humid climates.
After drying, crumble the leaves and store them in an airtight glass jar away from direct sunlight.
Properly dried lemon basil will keep its potency for up to a year.
How to Preserve Lemon Basil by Freezing
Freezing is my favorite way to preserve lemon basil because it retains that fresh, just-picked flavor better than drying.
The low temperature halts enzymatic breakdown, locking in both taste and aroma.
1. Freeze Whole Leaves
To preserve lemon basil leaves whole, wash and dry them thoroughly, then lay them flat on a baking sheet lined with parchment paper.
Make sure the leaves aren’t overlapping so they freeze individually.
Once frozen solid for a couple of hours, transfer the leaves into a freezer bag and squeeze out all the air before sealing.
This way, you can pull out just a few leaves at a time, which makes it super simple to preserve lemon basil for single-use portions.
2. Freeze in Oil or Water
Another brilliant way to preserve lemon basil is to chop the leaves finely and pack them into ice cube trays.
Cover the herbs with olive oil or water, then freeze overnight.
Once solid, pop the cubes into a labeled freezer bag.
This method gives you ready-to-drop flavor bombs for soups, stews, sauces, and stir-fries.
Plus, the oil helps protect the basil from freezer burn and keeps the flavor sealed in.
Frozen lemon basil cubes will last for about six months when stored properly.
How to Preserve Lemon Basil in Oil or Butter
If you want a luxurious way to preserve lemon basil, infusing it into oil or butter is absolutely wonderful.
These preparations are perfect for spreading on bread, tossing with pasta, or drizzling over grilled veggies.
1. Lemon Basil Infused Oil
To make a simple infused oil, gently heat a good quality olive oil and add fresh, fully dried lemon basil leaves.
Never use wet leaves because water in oil creates a botulism risk, so make sure your basil is bone-dry.
Warm the oil on the lowest setting for about 30 minutes to let the flavors meld, then strain out the leaves and pour the oil into a sterilized bottle.
Keep this in the refrigerator and use it within two weeks for the safest experience, as homemade infused oils don’t have the preservatives of store-bought versions.
This is a quick way to preserve lemon basil if you don’t mind it being a short-term treat.
2. Lemon Basil Butter
Another crowd-pleaser is compound butter, which is an excellent way to preserve lemon basil in a rich and savory form.
Simply soften a stick of butter, then mix in a handful of finely chopped lemon basil, a pinch of salt, and maybe a little lemon zest.
Roll the mixture into a log using plastic wrap, twist the ends to seal, and refrigerate or freeze.
You can preserve lemon basil butter for several months in the freezer, and it slices beautifully for melting over steaks or corn on the cob.
So, How Do You Preserve Lemon Basil Best?
Now you know the answer to how to preserve lemon basil, and there’s no single “right” technique because it depends on how you plan to use it.
Drying is best for long-term pantry storage, freezing keeps the fresh flavor alive, and oil or butter infusions add a gourmet touch.
For the longest shelf life, dried lemon basil wins, but for the most vibrant taste, frozen or butter-based preservation is your winner.
Whichever method you choose, always start with clean, dry leaves and airtight containers.
Having answered how to preserve lemon basil, I hope you feel ready to put these steps into action with your own harvest.
So go ahead, preserve lemon basil today, and you’ll be savoring that delightful citrus herb all winter long.