Sporting a shell made of nacho cheese-flavored Doritos, the item is filled with seasoned ground beef, shredded lettuce and Cheddar cheese. The suggested retail price is $1.29, or $1.69 for a Doritos Locos Tacos Supreme with reduced-fat sour cream and diced tomatoes.

The Supreme version is also available as part of a Big Box Meal with a Burrito Supreme, Crunchy Taco and a medium drink. Those counting calories can order the Doritos Locos Taco Fresco Style, with 140 calories, about 30 calories less than the regular version.

Have you tried Taco Bell's newest menu item yet?

Company officials hope the new product, along with other menu upgrades, will turn around sales that sank in 2011 following a lawsuit that questioned the quality of the chain’s seasoned beef. The lawsuit was later dropped, but sales dipped 2 percent for the year.

Taco Bell chief executive Greg Creed said in a statement that the partnership between Frito-Lay, the maker of Doritos chips, and the 5,600-unit Taco Bell offered “a flavor pairing just waiting to happen.”

And more flavors are coming.

Creed said the chain plans to introduce a Cool Ranch Doritos-flavored shell in the fall. Fans have already begun requesting other flavors, he added.

“With the wide range of Doritos flavors available, the possibilities for this product platform are endless,” said Creed.