Tommi's Burger Joint is due to open its second site, on the King's Road in Chelsea, London, in January 2014.
As with its existing site, the restaurant will use meat from HG Walter butchers in Barons Court, and bread from Millers Bakery.
The burgers will be cooked on an American gas grill to enhance the charcoal flavour, and garnished in the classic diner style with iceberg lettuce, tomatoes and chopped onion, along with fries, homemade Béarnaise and cocktail sauces.
The new site will also serve a special Icelandic beer, Viking, with a nod to the Icelandic heritage of founder Tomas Tómasson.
Tommi's began life in London as a pop-up in Marylebone in 2012, before making the move to a permanent site on Thayer Street in Marylebone in August. The burger flipping at 342 King's Road will be led by Tommi's head chef Siggi Gunnlaugsson, who will divide his time between both sites.