Preserving Fresh Herbs: Drying, Freezing, and Oil-Infusing
The moment herbs come home from the market, they begin to wilt. Preserve them at their peak by choosing the right method for the herb you have and how you plan to cook with it. Some methods take minutes; others need only time and darkness.
Pick and preserve at the right moment
Harvest or buy herbs in the morning after dew has dried but before the day gets hot. Herb flavor peaks then. Wash gently only if dusty—excess moisture speeds decay. Pat dry with a clean cloth before preserving.
- sharp knife
- cutting board
- paper towels or clean cloth
- rubber bands or kitchen twine
- airtight containers or freezer bags
- ice cube tray
- glass jars
- cheesecloth (optional, for straining oil)
Match the method to the herb's structure
Tender herbs with high water content (basil, cilantro, parsley) freeze or oil-infuse best. Sturdy, woody herbs (rosemary, thyme, oregano, sage) dry without losing much character. This distinction determines whether your preserved herb will taste fresh or diminished.
The method.
Drying: Prepare the herbs
Strip leaves from thick stems. Discard any yellowed or bruised leaves. Leave small, tender sprigs intact; break larger ones into 3- to 4-inch pieces. Pat dry again with a towel.
Drying: Bundle and hang
Gather 5–8 stems into a loose bunch. Wrap a rubber band around the base once, leaving room for the bundle to shrink as it dries—if you cinch it tight, the inner stems will trap moisture. Hang upside down in a warm (65–75°F), dark, well-ventilated space. Direct sunlight fades color and oils. A closet, pantry, or dry corner away from the kitchen works well.
Drying: Check for doneness
After 7–10 days for tender herbs and 10–14 days for woody ones, touch a leaf. It should crumble between your fingers, not bend. If the stem still feels pliable, hang for another few days.
Drying: Store
Strip leaves from stems once fully dry. Store in an airtight glass jar away from light and heat. Dried herbs hold flavor for 6–12 months, though potency fades after 6. Label with the herb name and date.
Freezing: Wash and dry the herbs
Rinse gently if needed and pat completely dry. Any water left on the leaves will form ice crystals that damage texture.
Freezing: Choose your vessel
For whole leaves or small sprigs: spread them on a parchment-lined tray, freeze solid (2–3 hours), then transfer to a freezer bag. For chopped herbs: finely chop them and pack into ice cube trays, filling each cube halfway. Pour water or neutral oil to the top—oil is better if you plan to use the cube in a hot pan without thawing.
Freezing: Freeze and store
Place trays in the freezer for 6–8 hours until solid. Pop cubes out and transfer to a labeled freezer bag. Freeze for up to 3 months. Use directly from frozen in soups, stews, and sauces—no thawing needed.
Oil-infusing: Prepare the herbs
Wash and dry the herbs completely. Bruise them gently between your hands to open cells and release flavor. Chop them roughly or leave small sprigs whole, depending on your preference.
Oil-infusing: Fill the jar
Place bruised herbs in a clean glass jar. Pour cold neutral oil (grapeseed, canola, or light olive oil) over them until fully submerged. Stir once to release any air pockets. Cap tightly.
Oil-infusing: Steep and strain
Refrigerate for 3–7 days, tasting from day 3 onward. Herb flavor will be fully extracted by day 7. Strain through cheesecloth into a clean jar, pressing the herbs to extract their oil. Discard the solids. Store in the refrigerator for up to 2 weeks.
Other turns to take.
Herb butter (a freezing hybrid)
Finely chop fresh herbs and mix into softened butter (1 tablespoon herbs per 4 oz butter). Roll in plastic wrap into a log, freeze, and slice into discs for finishing steaks, vegetables, or bread. Keeps frozen for 3 months.
Dried herb salt
Combine dried herb leaves with fleur de sel at a 1:3 ratio. Grind together in a mortar or food processor. Store in a sealed jar. Use as a finishing seasoning. Flavor is concentrated and lasts longer than oil-infused herbs.
Oil-infused with garlic or chili
Add a smashed garlic clove or dried chili flake to the jar before filling with oil. Steep the same way. Use on bread, in vinaigrettes, or for dipping. Strain after 7 days and refrigerate.
When it doesn't go to plan.
Tender herbs (basil, cilantro, dill, chives, parsley) lose vibrancy when dried—freeze or oil-infuse them instead. Reserve drying for sturdy herbs.
Frozen herb cubes in oil are best for cooking; cubes in water work for soups and stocks but dilute other liquids slightly.
Oil-infused herbs are ready to use immediately, unlike dried herbs which sometimes benefit from rehydration in warm water or wine before adding to a dish.
Never wash herbs before hanging to dry. If you must, do it the day before so they air-dry completely overnight.
Label everything with the date. Dried herbs fade faster than you expect; oil infusions separate if the herb wasn't dry enough.
A cool, dark pantry is better than the refrigerator for storing dried herbs—cold and humidity promote condensation.
The ones that keep coming up.
Can I dry fresh basil?
You can, but basil loses nearly all its volatile oils when dried, leaving behind a muted shadow of flavor. Freeze it instead, or dry it and use it for cooking applications where the herb is just supporting flavor—not the main attraction.
Why did my oil turn cloudy or separate?
Excess water on the herbs causes cloudiness and can promote mold. Ensure herbs are completely dry before infusing. If separation occurs, the oil separated from water—simply shake the jar before using, or strain and discard the bottom.
How do I know if dried herbs have gone bad?
Dried herbs fade with time but rarely spoil. Smell them—if there's no aroma left, they've lost potency and should be replaced. Color fading is normal; musty or off smells mean discard them.
Can I dry herbs in the oven?
You can, but it's easy to scorch them. If you do, spread leaves on a rimmed tray and set the oven to its lowest temperature (120–150°F). Leave the door cracked and check after 10 minutes. Most are done in 15–20 minutes. Hanging is more forgiving.
Which herbs freeze best?
Basil, cilantro, parsley, chives, dill, tarragon, and mint freeze well and retain flavor. Sage, rosemary, thyme, and oregano freeze acceptably but are better dried. Delicate herbs like arugula or microgreens don't freeze at all.
Do I use the same amount of preserved herb as fresh?
Dried herbs are more concentrated—use about one-third the amount you would fresh. Frozen herbs in oil can be used one-to-one with fresh, but frozen herbs in water release more liquid, so account for that in your dish. Oil infusions are potent; taste as you go.