Lewandowski, who played for Dortmund between 2010 and 2014, took his tally to 17 goals in 13 games against his former club. He also clocked up his 11th goal in just six Bundesliga appearances for Bayern so far this season.
Despite the heavy wins for Bayern Munich and Borussia Dortmund, RB Leipzig stayed atop the Bundesliga after beating Hertha Berlin 2-1.
Bundesliga: Japan's Daichi Kamada shines as Eintracht Frankfurt down Hertha Berlin 3-1 for season's first win
Kamada, who has four international appearances, set up efforts for Bas Dost and Sebastien Rode after Andre Silva had opened the scoring in the German capital.
Bundesliga: Robert Lewandowski breaks goalscoring record; Erling Haaland brace helps Dortmund secure second place
It means Dortmund are assured of second place with one game of the season remaining. Despite defeat, Leipzig are virtually assured of Champions League football next season.
DFB-Pokal: Robert Lewandowski's winner takes Bayern Munich to final with narrow win over Eintracht Frankfurt
Bayern Munich will face Bayer Leverkusen in the final on 4 July in Berlin.
DFB Pokal: Eintracht Frankfurt to wear Black Lives Matter jersey in semi-final clash against Bayern Munich
Eintracht's usual sponsor, job website Indeed, offered the space for the hashtag to appear alongside its own logo for the match in Munich.
Bundesliga: Stefan Ilsanker's brace fires Eintracht Frankfurt to comfortable win as Werder Bremen remain in drop zone
Eintracht climbed to 11th position in the Bundesliga table with 35 points after the win over Bremen.
Bundesliga: Bayern Munich inch closer to eighth straight title with thrashing of Fortuna Dusseldorf; Hertha Berlin beat Augsburg
Robert Lewandowski scored twice as Bayern Munich took a confident step closer to an eighth straight German title with a 5-0 demolition of Fortuna Dusseldorf in the Bundesliga.
Eintracht Frankfurt are struggling to deal with playing in front of empty stands after action in the Bundesliga resumed following a two-month break caused by the COVID-19 pandemic.
Bundesliga: Bayern Munich avoid slight hiccup to thrash Eintracht Frankfurt 5-2, stay four points clear of Dortmund
Bayern Munich beat Eintracht Frankfurt 5-2 on Saturday, surviving a brief second-half comeback scare to stay four points clear of Borussia Dortmund at the top of the Bundesliga with seven games left to play.
Bundesliga returns with fist-bump celebrations and masks as Borussia Dortmund slam four past Schalke
Borussia Dortmund provided much-needed fireworks with a 4-0 demolition of bitter rivals Schalke after Bundesliga restarted in front of empty stands after a suspension of over two months
When the Bundesliga resumes on Saturday after a two-month suspension caused by the pandemic, Borussia Dortmund and Leipzig will be Bayern's main challengers
Coronavirus Outbreak: DFB-Pokal final postponed indefinitely due to COVID-19 pandemic, says Germany's football federation
Football in Germany has been suspended since mid-March and will remain so until at least 30 April. The German Football League is hoping to restart the Bundesliga sometime in May
Bayern, Eintracht Frankfurt fined by UEFA for fans' banners, Manchester City charged $3000 for uniform rules violations
Bayern was ordered to pay 20,000 euros ($22,000) for transmitting a provocative message of an offensive nature during a Champions League game at Chelsea in February
Europa League: Second-leg fixture between Salzburg, Eintracht Frankfurt postponed after storm warning
Frankfurt said the decision to postpone the game was made in a meeting involving local authorities, police, UEFA and representatives of both clubs after the safety of traveling spectators could not be guaranteed
Bundesliga: Borussia Dortmund hammer Eintracht Frankfurt 4-0, gain momentum ahead of Champions League clash against PSG
Dortmund bounced back from two consecutive defeats in the German Cup and league last week, filling up on confidence ahead of Tuesday’s Champions League Round of 16 first leg at home to PSG
The Bundesliga game between title challenger Borussia Monchengladbach and Cologne has been rescheduled for 11 March after it was postponed due to a storm.
Timothy Chandler scored twice to power Eintracht Frankfurt to 5-0 over Augsburg in the Bundesliga.
DFB Pokal: Borussia Dortmund knocked out by Bundesliga strugglers Werder Bremen; RB Leipzig lose to Eintracht Frankfurt
Dortmund lost 3-2 to Werder Bremen, a major upset given that Werder are battling against relegation from the Bundesliga while Dortmund challenges for the title
Bundesliga: RB Leipzig hope to recover from hairdresser controversy to maintain top spot in points table
Bundesliga leaders RB Leipzig players will take on Borussia Moenchengladbach on Saturday knowing it is not just their slim league lead that is on the line but also their reputation.