Yes the best recipes that I've seen for weed tea is to take a stick of butter and melt it in boiling water. Add the weed and let it boil away for about 20 - 30 mins, or longer to really get all the THC out. Then let it cool enough to put the mixture in the fridge. As the mix cools the butter hardens - along with the THC - and you can pour off the water. Then use the butter in cooking or you can make tea (or Bhang).

Not sure of the quantities (how much weed, butter, water) you'll have to google it.