I inherited a half trash bag full of white rhino fan leaves. It was full but I didn't like the look of the bottom of the bag, so I turfed that half which included a good layer between the questionable leaf and the top half. Since I didn't think it would be worth trying to make hash I spread them out and over a 4 day period allowed them to air dry. I then crumbled them to powder and put them in a big pot half full of boiling water and 3 and a half pounds of butter.
Because of the mass involved I steeped them at a slow simmer for approximately 90 minutes, stirring often. Most of the butter appeared to be absorbed by the material.
Strained through cheesecloth, saving the liquid, put the solids into another pot and heated gently for 15-20 minutes stirring often. Strained again and the solid material squeezed to remove as much butter as possible into a third pot. The strained liquid from the first 2 pots was cooled in the freezer and the layer of butter on top collected and added to the third pot(butter only).
Reheated the butter in pot 3 then froze it. Repeated twice, each time with less solids in the butter, as solids settle out in the freezing process.
Melted and poured into ice cube trays and made 40 one oz cubes plus 1/3 cup which went into brownies while liquid, in place of the oil called for.(1/4 cup oil)
8 brownies, tried one last night and had a noticeable buzz for about 5 hours, no need to add to it with smoke.
Had 2 today at 5pm and at almost 10 pm I'm still well and truly stoned, very solid head stone and good body stone but not a couchlock experience. Really well worth the effort. I didn't expect to get much out of fan leaves but I'm quite impressed.
1/3 cup is about 80 milliliters . So 20 mils in 2 brownies has produced what I would call a good, long lasting (still going at 5 hours) stone that is very enjoyable and shows no sign of fading yet. Taste was almost completely unnoticeable except in a couple of spots and those spots weren't overpowering just noticeable. Brownies don't require a lot of stirring so I may have mixed a little less than needed.
Now I have no choice but to try 3 brownies because i have an uneven number left.
heheh I can do this 50-60 more times, at 2 brownies a pop wooohoooo.
edit: forgot to mention that I first baked the powdered plant material for 20 minutes at 195F to decarboxylate the thc. At that temp it should happen quickly but no thc will vaporize.