to make stronger cannabutter (or just a lazier method), get a crock pot, and melt the butter in there without water. because of the nature of crock pots you cannot burn it, simply melt the butter, throw in the ground up clippings, bring to a simmer, and let it simmer for about an hour. Then turn off the crock pot and let it cool, then bring it back to a simmer and let it simmer for another hour, then strain it out into a tupperware and throw that bitch in the fridge.
also - you can keep repeating the cool down/ reheat to simmer step to make considerably stronger butter. the more time you put into this step, the stronger your butter will be