In a nice bit of symmetry, PepsiCo (PEP -0.5%) will roll out Taco Bell-flavored Doritos to cash in on the enormous success of Taco Bell's Doritos Locos Tacos menu item. The company's Frito Lay business says it will mark the first time since 1990 that is has launched a Doritos chip branded with the logo of a national restaurant chain.