The California-headquartered company climbed three spots in the list and was ranked No. 1 in the magazine's 2012 '100 Best Companies to Work For' list.

"Everything was up at Google last year – revenue, profits, share price, paid search clicks, hiring -- and so, too, was employee love," Fortune said.

Employees at the internet giant "rave about their mission, the culture and the famous perks of the Plex: bocce courts, a bowling alley, eyebrow shaping (for a fee) in the New York office," according to the magazine.

"Then there's the food: some 25 cafés companywide, all gratis," it noted.

In the second spot was Boston Consulting Group. Fortune said the global consulting giant invests 100-plus hours and thousands of dollars to recruit each consultant and once hired, they earn an average of USD 139,000 a year.