http://www.growkind.com/cooking.html Which extracts thc by boiling it out. Can imagine u gotta stir simmering milk often and for an hour. And then there are tons of chai-like recipes that are like this one http://leda.lycaeum.org/?ID=4774 which extracts thc by steeping it in boiled water then grinding it up with warm milk repeatedly. I'm trying to determine how many dosages are in those recipes, they typically use 1 oz weed to 6 cups liquid. From the auther of that second site I posted ... Note sure which method is more efficient. If we substitute some cream for some of the milk that would be even more efficient.
the first recipe posted is very similar to one told to me by a Jamaican friend here at school. So i would go with that one.