The new 15,000 sq ft Cosmo restaurant, which recently opened in Derby, is set to become the flagship for the group, as it announced plans for five more openings.
Cosmo revealed plans for openings in Edinburgh, Preston, Nottingham, Sheffield and Leeds, all following the same design as the Derby branch.
The company already has 13 other all-you-can-eat banqueting restaurants in the UK, but the Derby branch represents a departure for the brand, according to the chain.
Diners pay one price for the eat-all-you-like buffet at the 330-seater restaurant, which costs £7.50 at lunchtime and £12.99 at night.
Cosmo said the new design was inspired by Far Eastern five star hotels and Michelin-starred UK restaurants, reflected in expensive stonework and marble fittings, as the company tries to move from a traditional buffet restaurant to a "global banqueting experience" specialising in pan Asian cuisine.
"When we opened our first restaurant in 2003 we revolutionised the idea of a buffet and completely turned it on its head to offer freshly-cooked global cuisine at great value. Since then we've launched 13 other venues around the UK and have learnt some valuable lessons along the way.
"Here in Derby we have put all this knowledge into practice and shaken up the country's restaurant scene yet again. We are offering the city five star dining for a fraction of the price and a restaurant which is architecturally inspiring, elegant and the future face of our brand."
It is Cosmo's first restaurant in the East Midlands and offers diners 180 dishes drawn from global cuisines including Indian, Oriental, Brazilian, Japanese and European.