I was determined to make a nice dinner Monday night and made fresh bread - only to realize that I had NO butter! So I improvised and used heavy cream and made my own fresh butter! It's easy to do - you pour some cream in a jar - I add a little salt for taste and shake until it gets so unbelievably thick that you don't think it will do anything - and then suddenly it sloshes and forms into a hard ball and the buttermilk is drawn out of the butter. It's pretty cool!
Some pictures of the process:
