Pitt first tasted the jam when he and his eldest son Maddox, 11, flew to Alsace, where the fruity delicacy is made.
Then, Pitt immediately tracked down its maker Christine Ferber. After which Pitt decided to visit her in person during a recent break in filming. "Brad is very particular about what he eats but fell in lust with this jam. He turned detective and discovered Christine has a little shop in the Alsace region, where she makes the artisan jams. It is very well known among the jam-making fraternity," a source said.