I once made a batch of cookies but they didn't seem to do anything. Each cookie contained about 1g of pot, but still nothin. Later I made a batch using a different method of extracting the THC and I was flying!!! The problem with the first batch was the oil that I used, I didn't get it hot enough or long enough to extract anything. The trick with getting the more THC out is too cook the oil/butter for a while at a fairly high temperature. THat should do the trick. If you don't think that the THC is being extracted I would just skip straining the oil/butter and just leave the plant matter in. It may taste slightly worse, but you know you will get baked.