Tarragon vinegar is a staple of French cuisine. (French chefs often combine it with mustard.) “I believe that if ever I had to practice cannibalism,” James Beard said, “I might manage if there were enough tarragon around.”
It’s easily made. I took a sprig of French tarragon (Artemisia dracunculus var. sativa) from the garden and placed it in a sterilized bottle. Then I submersed it in boiling white wine vinegar. Let cool and cap. If you are using fresh French tarragon from the garden the result will be excellent — wonderful in salad dressings but also great even for things like deglazing skillets.
For best results, store in a dark place for a couple of weeks to allow the tarragon oils to infuse.