Through her mother she was the granddaughter of King Henry III of England and Eleanor of Provence.

The couple had seven children, they were: Blanche's husband served under his father at the Battle of Furnes, where he was wounded.

His premature death led to a legal battle later, when Artois was left to his sister Mahaut rather than his son Robert.

Her sister, Marie was married to Guy IV, Count of Saint-Pol.

Blanche died on 19 March 1327 at the Chateau de Bois-de-Vincennes, and was buried in the now-demolished church of the Couvent des Jacobins in Paris.