Smith, who had entered the prestigious competition for the first time this year, won the title following a fierce cook-off in the kitchens of London's Westminster Kingsway College this morning.
Competitors were asked to cook turbotin jubilee, whole braised turbot with lobster mousseline, scallops and caviar, garnished with artichoke bottoms and asparagus tips and a champagne sauce, in two hours and 30 minutes.
Their culinary skills were judged by a panel of industry experts headed by scholarship founder Michel Roux, his brother Albert, son Alain and nephew Michel Jnr. The judges also included former Roux Scholars two-Michelin-starred chefs Andrew Fairlie and Sat Bains as well as David Nicholls, Gary Rhodes, Brian Turner and the BBC2 Saturday Kitchen presenter James Martin.
A 2011 Acorn winner, 24-year-old Smith is already an experienced competition chef having won a gold medal at the 2009 WorldSkills competition in Calgary and assisted both former Roux Scholars Andre Garrett and Simon Hulstone as commis chef at the 2007 and 2009 Bocuse d'Or.
In 2010 he was selected to represent the English National Culinary Team at the Culinary World Cup in Luxembourg, winning a gold medal in the Restaurant of Nations. That same year he also won the Craft Guild's Young Chef of the Year award.
As the 29th winner of the Roux Scholarship, Smith has won a three-month all expenses paid stage at a three-Michelin-starred restaurant of his choice. He has also won an expenses-paid trip to Champagne Gosset in Ay, and a trip to visit the Caffe Musetti roasting factory in Milan.
The other five finalists were:
Edward Attwell, Love's Restaurant, Birmingham
Quinton Bennett, The Arch, London
Arbinder Dugal, Le Pont De La Tour, London
Pramod Ghadge, Catlin Underwriting Agencies operated by Harbour & Jones, London
Robert Hutchins, Rudding Park Hotel, Harrogate