By Colette Bennett Twitter had a big reaction to Burger King’s newest Whoppers. In order to find success in the fast food industry, innovation must be a key ingredient in the recipe of every brand. And not just a one-time innovation, but the ability to continually come up with new approaches and ideas, constantly reshaping the brand identity and menu offerings to keep customers interested. The most successful fast food brands have mastered this technique. Some, like McDonald’s (MCD) – Get McDonald’s Corporation Report, stick to the traditional offerings that made it a household name, carefully…