A quick method Ive seen a couple places, though never tried myself, is to put some bud btween two crackers and some peanut butter, and then heat it in the oven. Peanut butter is very high in oils, so the THC will absorb easily. But yeah, just heating some bud in oil or butter will work, although I know alot of people dont like the taste of bud butter straight, although again, I havent tried it myself.