I don't think its necessary to completely grind up all the plant matter into a fine powder and adding it to the oil. When I do it , I just use a normal hand grinder or use my fingers and break up all the plant matter into small pieces. Then I add to oil , cook for 15 minutes MEDIUM heat. You can see when the oil is ready as it turns from a clear amber to a dark brown . Also , you only need to add about an eighth (3.5 grams) for an entire batch of brownies. (as long as it is good smoke not schwag) . From there I pour the entire pan into a fine metal strainer over the sink into a measuring cup. Then I use a spoon to press the plant matter in the strain to get all the oil out and then just add to the recipe. I prefer this method other than actually eating the plant matter . I have made about 20 or batches this way and it is extremely effective. One time I made a batch and gave one to a friend and he said it made him cry and he had an epiphany about life. Extremely strong and lasts up to 8 hours. I can recall many times I woke up the next day and i was still stoned big time ! I cook up all mine till where all the plant matter is black and there is a slight smoke rising from the pan. I believe this higher heat setting may stimulate more extraction from the plant although I would not recommend it for an extended period. Also , be prepared that cooking this will stink up your house ! Have some windows open and plenty of good ventilation. Also , it is true that you want to wait about an hour and a half before deciding to "eat another one" cause you don't feel anything. People have different metabolisms and absorption rates so be patient. One time my girl friend decided to eat 4 in row because she didn't feel anything... and after that she got sick and threw up because she said the room was spinning and she was hearing voices. You don't want to ruin a good experience by over doing it. In addition, I mean no dis respect to the original poster as I think his guide is clear , concise, and well put. I only disagree with grinding to a powder and eating it as well as not letting it cook till its black as I have had fantastic results this way.