Bayern controlled proceedings from the start up north and went ahead early on when Giulia Gwinn got down the right and crossed into the box. Goalkeeper Lea Paulick wasn't able to gather the ball, allowing Imade to head in.
Hearts had enough chances to have won more convincingly, but their supporters greeted the full-time whistle with jubilation as they stretched their lead over Rangers and Celtic, who face each other at Ibrox on Sunday.