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.
Champions League: Robert Lewandowski dedicates double against Salzburg to ailing 'King Gerd' Mueller
Lewandowski converted a first-half penalty, then headed home a second as Bayern roared back from conceding an early goal to claim a convincing 6-2 win in Austria.
Polish media reported last month that Kucharski demanded 20 million euros from Lewandowski for their past business cooperation. Lewandowski denies owing him money.
Despite the heavy wins for Bayern Munich and Borussia Dortmund, RB Leipzig stayed atop the Bundesliga after beating Hertha Berlin 2-1.
UEFA Nations League: Harry Maguire sent off on bad night for England, Kylian Mbappe gets France winner
Harry Maguire was sent off for England in the first half at Wembley for two clumsy yellow cards, and Christian Eriksen then converted a 35th-minute penalty on the occasion of his 100th cap to put the Danes ahead.
Bundesliga: Robert Lewandowski nets four goals as Bayern Munich clinch seven-goal thriller against Hertha Berlin
The victory got Bayern back to winning ways after their record 23-match winning streak was ended by a 4-1 defeat at Hoffenheim last Sunday.
Lewandowski was at the Champions League group draw in Geneva to receive the award, just weeks after Bayern won the 2019/20 edition of the competition.
UEFA Awards: Bayern Munich, Lyon stars dominate men's, women's POTY nominations after Champions League wins
The winners will be announced on 1 October, when UEFA hold the draw for this season's Champions League group stage at their headquarters in Nyon, Switzerland.
Bayern Munich striker Robert Lewandowski voted Germany's Footballer of the Year after triumphant season
Lewandowski received 276 votes, well ahead of two other members of Bayern's triple-winning squad: Thomas Muller (54 votes) and Joshua Kimmich (49).
Champions League: Methodical Bayern Munich battle past Paris Saint-Germain to claim sixth European Cup
Heading into the match against PSG, it seemed rather inevitable that this new look Bayern would rip the French club from limb to limb, but the actual match turned out to be much closer than expected
Champions League 2020 final, Bayern vs PSG, Highlights: Bayern crowned European Champions via solitary Kingsley Coman goal
It is a mouthwatering showdown between two of Europe's super clubs, with PSG eager to cap their rise in the last decade under Qatari ownership and Bayern hoping to lift the trophy for the sixth time.
Champions League Final preview: Plenty of goals on offer as Bayern Munich take on Paris Saint-Germain
The Champions League final will see Bayern Munich, five-time champions, take on PSG who are in the final for the first time.
Champions League 2020 Final live streaming: When and where to watch PSG vs Bayern Munich match online
PSG and Bayern Munich will meet in the final with the French club seeking their first Champions League trophy and the German powerhouse trying to end a seven-year title drought in Europe's top club competitio
Champions League: Serge Gnabry's brace propels ruthless Bayern Munich past Lyon, sets up final against PSG
Bayern Munich are the first team to win their first 10 matches of a Champions League campaign and now hope to make it 11 out of 11 when they face PSG in the final.
This Bayern Munich's 19th consecutive victory in all competitions, and a 28th game unbeaten for Hansi Flick's side. They have now scored 39 goals in nine Champions League outings this season.
Champions League: You can't compare Robert Lewandowski and Lionel Messi, says Bayern Munich boss Hansi Flick
Lewandowski is enjoying the best season of his career so far with 53 goals in 44 games, while Messi has managed 31 in 43 matches.
Champions League: Robert Lewandowski, Lionel Messi run riot as Chelsea, Napoli trudge along helplessly
Like Lewandowski, Messi is one player you should tune in to watch as a neutral, lest your mind remains unexpanded by the boundaries these two players push.
Champions League: Robert Lewandowski scores brace as Bayern Munch cruise past Chelsea, win 7-1 on aggregate
Lewandowski has 13 goals in seven Champions League games this season — putting Cristiano Ronaldo's record of 17 within reach — and 53 in 44 across all competitions.
Champions League: Bayern Munich boss Hansi Flick mulls starting Ivan Perisic or Philippe Coutinho for last 16 second leg
Bayern host Frank Lampard's Chelsea at the Allianz Arena in the last 16, return leg holding a 3-0 advantage after routing the Blues at Stamford Bridge last February before the competition was halted due to the coronavirus pandemic.
The Court of Arbitration for Sport ruled two weeks ago that some of UEFA's accusations of financial violations by City could not be proven and others were time-barred because they did not meet a five-year statute of limitations.