In the 23rd minute Robert Lewandowski beautifully scored a hat trick in the opening moment.
After being brought down by Salzburg defender Maximilan Wober, the Poland captain scored two penalties in 21 minutes, the shot into the bottom left corner was Lewandowski's 40th goal and was the first penalty kick of the game against Salzburg. And with close range adding a third goal, this hat trick was the first to be completed in the 23rd minute in the Champions League.
Salzburg should have had 2 chances, early chances with Nicolas Capaldo and Nicolas Seiwald but all failed due to a splendid chance conversion error.
And in the end they were overwhelmed against a deadly attack from Munich by Lewandowski, Serge Gnabry on the fourth shot followed by Thomas Muller on the fifth.
It was a gloomy night and almost like a bad memory for Salzburg who are the visitors. Finally on the night there was at least a goal from Salzburg which Mauritz Kjaergaard shot with a powerful shot into the top left corner and managed to revive Julian Nagelsmann's side back to life.
Lewandowski has inspired Bayern a lot, and Salzburg also seem to have real hope of becoming the first Austrian team to reach the last eight of the competition since 1985.
The 33-year-old twice beat Wober to set the tone for the second and third legs - as he hit 85 Champions League goals in three fewer games than Lionel Messi and 17 before Cristiano Ronaldo - is all about his determination to keep going.
After Ronaldo (seven) and Messi (five), Lewandowski is now only the third player to score 10 or more goals in three or more different Champions League campaigns.
And not content to settle for complacency after being the top scorer in the competition this season, Lewandowski was also involved in Muller's second before setting Sane in for Bayern's seventh of the night.