This has got to be the best brownie thread going on the web
I am currently saving up my abv for making a batch of brownies and will be trying the oil/vinegar leach method. Very interested in the use of vinegar.. I had to google a little on that being a bit of an herbalist in the non-mj way.
I stole this from another site:
Half-fill a mason jar (a heat resistant glass jar, with an air-tight cap) with well dried plant material. The plant material should be crushed or crumbled, but not powdered.
(Optional) Add to the jar with the herbs a teaspoon of apple cider vinegar for every cup of oil that you're going to use. As with the plant material amount, this is based on the volume of the jar. Place the lid on and shake vigorously to distribute the vinegar. Shake the jar several times, over a few hours. Vinegar acts as a mild solvent, and helps release constituents that are not oil-soluble.
Fill the jar with a cold pressed oil that has good keeping (shelf life) qualities. Jojoba, macadamia and high-oleic sunflower oil are all suitable for herbal infused oils.
Firmly fasten the cap, and keep the jar with the oil infusion in a warm place (45C / 113F) for at least 24 hours.
Gentle heat and a sufficiently long steeping time are fundamental to extract from the plant material its beneficial properties without losing the most volatile constituents, which would evaporate if the infusion is exposed to high temperatures. You can for instance keep your jar on a sunny windowsill, or place it in an "incubation box" heated by a reading lamp, or use a crockpot on the appropriate setting (remember, the temperature should never go above 50C / 122 F).
At the end of the steeping period, filter the oil through a sieve and then through a cheesecloth.
If you want to keep your oil as a "single infusion", squeeze well the cheesecloth to reclaim as much oil as possible.
Double and triple strength infused oils are made by adding the infused oil to a new batch of plant material, and repeating the process.
I will be putting my jar in the oven with the light on.. between the stupidly high temps here, and the fact that my kitchen is always very warm- it will stay pleasantly toasty for the infusion. I'll likely strain it as is my preference. I will weigh & post pics. It may be a while as I need to get more ABV together... like that's a chore.