I I started with eight pounds of butter and ended up with just six pounds of cannabutter.

I use cheesecloth and a potato ricer to really squeeze the mash after cooking.

Afterwards I have a bunch of hockey puck looking things that I just toss in my compost. I have tried to boil the remains and several other recommended steps for recovering the remaining butter. The return for the effort is so small like 1/4 cube that it is not even worth it.

Probably the best advice for you is to add lots of water to the mash and heat then strain and cool the cannabutter will harden on top of the water. Please update the thread if you find a way to get most of your pound of missing butter out of the cheesecloth and leftovers.