Vadouvan is most easily described as the French equivalent of the British curry powder. The principle is the same as that of curry powder in that its purpose is to adapt Indian spices to suit European taste buds; however, vadouvan does it with the characteristic French panache and subtlety. This history of vadouvan lies in the French colonial possession known as Pondicherry. This settlement in southern India was controlled by France from the middle of the 17th century all the way up to the middle of the 20th century. French chefs in this settlement used a Tamil spice blend called vadagam as their primary influence for vadouvan. Vadagam was traditionally rolled into balls and sun-dried before being used to flavor dishes.
Despite being around for centuries, vadouvan was not widely known in the US until chef Ludo Lefebvre of the famed LA eatery Trois Mec placed it on the foodie radar in 2005. This began a trend that continues today with American and western European gastronomes rediscovering this spice blend.