Taco Bell Corp. is having all kinds of success after the integration of the Doritos Locos tacos into its already popular menu.

The Irvine, Calif., fast-food chain, which is part of Yum Brands Inc. (NYSE: YUM),  last year added 15,000 jobs to help handle rapid growth of the company's brand after the successful launch of its most popular product to date.

The company introduced in March 2012 the Doritos Locos tacos, a normal taco made from Nacho Cheese Doritos chips. Taco Bell CEO Greg Creed told the Daily Beast, “It has been the biggest launch in Taco Bell history.”

Creed said the success of the product launch led the company to hire more employees. He added that the company could see further growth as it rolls out Taco Bell’s follow-up to the Nacho Cheese DLT.

“We believe we can add 2,000 new restaurants in the next 10 years, because what we have is proprietary and exclusive. Nobody else can make a Cool Ranch Doritos taco. And that’s just in the U.S.,” Creed told the Daily Beast.

Unlike the original DLT, the Cool Ranch DLT is a taco shell made from Doritos Cool Ranch chips. Taco Bell said it plans to support the Cool Ranch DLT launch with its largest marketing campaign in the company's history, even topping that of the original Nacho Cheese DLT.

Taco Bell’s recent hiring spree comes as the national unemployment rate fell slightly in February to 7.7 percent.