Last year's champion Shahjalal and runner-up Jibon Boli did not participate in this year's competition
Thomas Mueller gave Bayern the lead in the fourth minute.
Although Barca quickly replied with an own goal from David Alaba, the slick Germans went on to rip fresh holes through the Catalans, scoring three goals in the space of 10 minutes through Ivan Perisic, Serge Gnabry and another from Mueller.