How to Make Flavored Herbal Oils for Cooking

Herbal Oils

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  • Total: 168 hrs 15 mins
  • Prep: 168 hrs
  • Cook: 15 mins
  • Yield: 1 bottle

Herb-infused flavored oils for cooking, such as basil, rosemary, or garlic, are widely available at high-end grocery stores and specialty cooking shops, but they can be very expensive and they don't always have a true, robust herbal flavor. They are often processed and may have been sitting on a shelf for months. Fortunately, herb-flavored oils are very easy to make yourself either from the herbs you grow or purchase. They are wonderful to cook with and decanted into pretty bottles, are always welcome as gifts. 

The total prep time reflects that the oil needs to steep for 1 week to ensure maximum flavor.

Ingredients

  • Fresh or dried herbs of your choice (see variation ideas below)
  • Light cooking oil such as vegetable, canola, or virgin olive oil

Steps to Make It

  1. Gather your ingredients, as well as jars for storing the oil.

  2. It is best to choose sprigs of herbs that do not require washing. Simply shake off any soil and do a once-over for any hitchhiking insects. If you must clean your herbs, rinse them off and give them several hours to thoroughly dry before using. Any water left on the herbs will impede their contact with the oil.

  3. Sterilize clean glass bottles or jars by boiling them in water for ten minutes. Allow jars to dry thoroughly.

  4. Slightly bruise your herbs with a wooden roller to release their oils. Fill herbs into the bottles. You don’t need a large quantity of herbs. Depending on the pungency and freshness of the herbs, a sprig or two could sufficiently infuse the oil.

  5. Heat the oil on low heat, in a saucepan, just until warm. then carefully pour the oil into the bottles, over the herbs. Allow the contents to cool.

  6. Carefully pour the oil into the bottles, over the herbs. Allow the contents to cool.

  7. Once contents cool, if you used fresh herbs, you will need to strain them out of the oil by pouring the oil from the bottle through a strainer or coffee filter, and into a new bottle. Dried herbs can remain in the oil, but the oil will stay fresh a bit longer if these are also strained out. 

  8. Once the herbs are removed, seal the bottles with lids or corks, and allow the bottles to sit in a cool spot out of direct sunlight, for about 1 week before using.

Variations

  • The lighter the oil flavor, the more pronounced the herb flavor will be. While extra virgin olive oil is a kitchen favorite, it has a very pronounced flavor of its own. Lighter olive oil or something like virgin olive oil, canola oil, or vegetable oil are better choices.
  • Good choices for herbal oil infusions include basil, bay, chives, cilantro, dill, mint, marjoram, oregano, rosemary, savory, tarragon, and thyme. You could also add things like citrus peel for even more flavor.

Notes on Food Safety for Infused Oils

  • Always start with clean, dry herbs and sterilized jars or bottles. Do not use herbs that show any sign of mold. It is crucially important when preserving any type of food, that you always follow the processing instructions specified in the recipe and to adhere to the USDA guidelines on how to sterilize jars and other products for canning.


  • Homemade oils do not stay fresh as long as processed oils, and they will need to be used within a short time after opening. Flavored oils should be used within two months, at most. Straining out the herbs and refrigerating the oil will help the oil last longer. Many gift recipients won’t want to use something so beautiful, so be sure to put a "Use By" date on the label and remind them the oil won’t stay fresh for long, and promise to make more next year.