He was one of a handful of chefs in the United Kingdom to have been awarded the coveted three Michelin stars at his restaurant La Tante Claire in London.

It was with his maternal grandparents, Camille and Marcel, in Saint-Puy that he learned how to cook when he visited with them during school holidays.

Koffmann reminisced about this period in his 1990 book Memories of Gascony, and discussed it in an interview with The Guardian in 2010: "The produce was mostly from the farm.

Koffmann originally only wanted to move to the UK so that he could see England play France at rugby at Twickenham Stadium.

[3] La Tante Claire moved to The Berkeley hotel in Knightsbridge, London, in 1998,[3] with the former site being sold to become the flagship restaurant of Gordon Ramsay.

[4] During his time at La Tante Claire, Koffmann worked with several eminent chefs, including Ramsay, Marco Pierre White, Marcus Wareing and Tom Kitchin.

[4] After taking a break from restaurants, he was briefly head chef at the Bleeding Heart pub in Clerkenwell.

[citation needed] In 2021, he launched a restaurant-review website koffmannandvines.com with Richard Vines, the former Chief Food Critic at Bloomberg.