Original: Kellogg's Sugar Frosted Flakes of Corn, better known simply as Frosted Flakes, is a breakfast cereal first introduced by the Kellogg Company. It consists of corn flakes "frosted" or coated with sugar.
Simplified: Frosted Flakes (North American countries) or Frosties (UK, Commonwealth of Nations and EU countries) is a cereal like Corn Flakes from Kellogg's, but coated with frosted sugar.