At first mention the thought of mixing some unsalted butter with your morning Joe sounds a bit awful. That is until you give it a try - which I highly recommend you do. Get some grass fed unsalted butter, a small hand held blender, some strong black coffee and give it a go. I have to wonder how long it is until an enterprising coffee chain catches on to this.
Further details about this powerhouse drink can be found at the awesome BulletProof Executive site!