Making Herb-Infused Oil
Infusing oil turns a simple pantry staple into a concentrated flavor vehicle. The secret lies in heat control; too much heat fries the herbs, leaving the oil bitter, while too little fails to extract the essence of the plant.
Watch the temperature like a hawk.
The goal is to warm the oil, not cook the herbs. If you see the herbs browning or crisping, the oil is already too hot.
- Small saucepan
- Fine mesh strainer
- Cheesecloth
- Sterilized glass bottle
What goes in.
- 2 cupsneutral oil (grapeseed or refined olive oil)
- 1 cupfresh herbs (rosemary, thyme, or oregano), thoroughly dried
Steady, Low Heat
Keep the oil at a bare simmer—just enough to release the fragrance without turning the herbs into burnt bits. A heavy-bottomed pan helps maintain this steady, low threshold.
The method.
Prepare the herbs
Wash the herbs and pat them dry completely with a clean cloth. Any water left on the stems will cause the hot oil to splatter and shorten the storage life.
Warm the oil
Place the oil and herbs in a small saucepan over the lowest possible heat setting. Let them warm for about 10 to 15 minutes.
Test for color
Watch for the herbs to lose their bright green vibrancy and start to look dull. This is your cue that the essential oils have migrated into the base.
Strain
Remove the pan from the heat. Line a mesh strainer with cheesecloth and pour the oil through it into a clean glass container. Press gently on the herbs to extract every drop of flavor.
Cool and store
Allow the oil to reach room temperature before capping the bottle. Store it in a cool, dark cupboard.
Other turns to take.
Chili Oil
Replace herbs with dried whole chilies for a slow-steeped heat that works well on pizzas or pastas.
Garlic Infusion
Add two smashed cloves of garlic to the oil. Remove the garlic promptly once it turns pale gold to prevent an acrid, burnt aftertaste.
When it doesn't go to plan.
Always use completely dry herbs to avoid introducing moisture that can lead to spoilage.
Use a light-colored bottle if you intend to give this as a gift, or an opaque one if you want to protect the color for longer.
If the oil appears cloudy after cooling, strain it through a fresh piece of cheesecloth or a coffee filter.
The ones that keep coming up.
How long will this stay good?
Kept in a cool, dark place, it will maintain quality for about three to four weeks.
Can I leave the herbs in the bottle?
It is safer to remove them. Herbs left in the oil can rot, which introduces bacteria to your jar.
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