Definitely dump the water after you chill the butter in the fridge or freezer so it is solid and the water is easy to remove. You can clean the butter using water. There is a detailed thread on this. It will remove the taste and chlorophyl so the cannabutter tastes like regular butter. Basically they mix the butter and water, heat then cool and seperate it 3 times.
rudy2010 Reviewed by rudy2010 on . left over water from making cannabutter My butter is separated now, with the water on the bottom. I'd hate to waste anything good, so I thought I'd ask if there is anything I can make with this water. For example, could the water left over from making the butter be used in the brownie recipe? Rating: 5