yeah it seems that 4oz to 1lb of butter is not that bad and it didnt lose too much bud in the process. but if you are going to put 1lb of butter in one batch of brownies(must have tasted real nasty?) that has 4oz's of weed in it then yeahhhhhhh it will come out very potent lol.

I think next time if your going to do it again, then just use that 1lb of butter for more then one batch of brownies, preferably 4 or more batches.