In 2006, Dufresne lost to Mario Batali on "Iron Chef America". In 2007, he began making appearances as a judge on Bravo's Top Chef, which includes season 2, season 4, season 5, season 7 and season 12. He was invited to participate in Top Chef Masters in 2009 where he placed third out of four in the preliminary rounds. Dufresne also appeared in the final of the United Kingdom version of Masterchef, teaching the eventual winner. He appeared as himself in the 5th Episode of HBO's Treme alongside Tom Colicchio, Eric Ripert and David Chang.