By Daniel Kline The “home of The Whopper” has broken some core fast-food rules (and you may love it or be horrified). Fast food has some basic rules. You put cheese on a hamburger, for example, not hot fudge or shredded coconut. Those rules, however often get sacrificed when it comes to innovation. We’ve seen chains like McDonald’s (MCD) – Get McDonald’s Corporation Report, for example, use saffron — a savory flavor — as an ice cream topping. That’s actually fast-food steering into a cultural trend. The prevalence of cooking shows and competitions has made pairing ingredients that don’t go tog…