The suits sitting at the McDonalds' boardroom tables must be grinning like cheshire cats right about now. The fast food giant, who have reportedly taken a fair few hits recently after new initiatives failed to take off, have hit the nose on the head with their latest change. The Egg McMuffin is now the star menu item, after one simple ingredient swap has seen sales soar. The Egg McMuffin has seen a sales increase of late.  The breakfast item, which was traditionally prepared with margarine, has ditched the low-fat spread for real butter. While this is bad news for our waistlines, it has been good news for the franchise, who have seen a .9 per cent increase in sales since making the change. Fortune reports that the results were acknowledged during a conference call, in which executives also noted that the fast food giant is under increasing pressure. Steve Easterbrook took over as CEO in March of this year.  “People have more choices than ever about where to dine,” CEO Steve Easterbrook told analysts on the call. “We want to give them more reasons to dine at McDonald’s by recommitting to hot fresh food, fast friendly service and a contemporary restaurant experience.” Easterbrook apparently warned investors that McDonalds' turnaround was still in the early stages but said customers “are beginning to respond” to its move. Well, there's nothing for it except to go and test this out - investigative journalism at its finest.