A Courtney Sweetman-Kirk hat trick helped the Belles apply the pressure on league leaders Sunderland, reducing the gap at the top to just two points.
The Lady Black Cats were held to a draw at Reading on Saturday as Doncaster pounced on the dropped points a day later, thumping their FAWSL2 counterparts Oxford 5-1.
Gordon Staniforth’s side were in devastating mood in front of goal as striker Sweetman-Kirk added her first triple for the club with Tori Williams netting a tidy brace.
Gemma Simmonds managed to reduce the deficit in the 40th minute after Doncaster had raced into a 3-0 lead, however, the Belles proved too strong for their hosts.
The Belles have the chance to continue their rich vein of form when they make the trip to face Reading on August 30, 6pm kick-off.