How to make a berry vinegar? [topic digression moved from General Topics board]
There couldn't be anything simpler. I make raspberry vinegar with our homemade red wine vinegar. Just put a couple cups of raspberries in a quart jar, cover with good vinegar, put the lid on and let sit for a month or two. I don't bother to strain out the berries later but I would if bottling it for gifts.
Another favorite flavored vinegar to make is dried apricots in white wine vinegar. Again, just cover and soak.
Yes, I have made some flavored vinegars, some more successfully than others. For the best raspberry, I cheated and used a frozen juice concentrate. It was fabulous - better than when I used my own berries. The strawberry was so-so but probably because the berries were not intensely flavored enough to make a WOW statement. I was underwhelmed with both the tarragon and garlic vinegar. Preferred the plain.
NB: with all flavored vinegars, I took the safe path and made small quantities and kept them in the refrigerator. I wasn't afraid of dying but figured they would not hold their flavor as well as commercially prepared bottles. It is easy to make more when needed.