actually, i heard that the water takes away all the contaminants.. all the crap you dont want in the butter.. my butter turned out lame,, i used a poor quality weed and not sure i got alot of thc out of it.. why esle wouldnt i get high from the cookies?
I would lean towards NOT using water, or at least not using much.
The water isn't absorbing any THC, so why use it? Maybe to keep it from burning? I dunno
I would say just use butter, and keep a careful eye on it so it doesn't get all burned and nasty. Goodluck!