For education and discussion only. Not for commercial use. Creation of Pop-Tarts 40 years ago spawned a food revolution Bill Post was working as a plant manager for the Keebler Co. in Grand Rapids, Mich., when, one day, Kellogg's sent over a prototype of a product it wanted Keebler to manufacture. The product: A fruit-filled pastry that could be warmed in the toaster to make a quick, convenient, portable breakfast. Kellogg's called it the Pop-Tart. Four decades later, the original toaster pastry has become a staple of consumers' kitchens and a full-fledged icon of American pop culture. Although they didn't...