MUNICH: Dutch winger Arjen Robben was the inspiration as Bayern Munich crushed second division Kaiserslautern 5-1 on Wednesday to set up a mouth-watering German Cup final against Borussia Dortmund.

It will be a repeat of the 2012 final that Dortmund won 5-2.

Bayern, who face Real Madrid in the Champions League semi-finals next week, stayed on course for an unprecedented back-to-back treble having already clinched the Bundesliga title.

Bayern needed just 24 minutes to take the lead when Robben floated in a corner and Bastian Schweinsteiger headed in and Toni Kroos doubled the advantage in the 32nd with Robben again the provider.

Robben earned a penalty five minutes after the restart and Thomas Mueller converted the spot-kick before Simon Zoller pulled one back for the visitors on the hour mark.

Mario Mandzukic scored in the 78th to put the game beyond the visitors and substitute Mario Goetze completed the victory in injury time.