Anthony Gordon scored his first goal for Barcelona as the Spanish champions extended their perfect start in La Liga with a 3-0 home win over Getafe .
Soria denied Olmo before Yamal teed up Koundé for the third.
Bayern battled back once more when Harry Kane, who hit the woodwork in the first half, cut the ball back for Nathaniel Brown to tap in the equaliser 10 minutes from time.
Just as Frankfurt were getting back into the game, Nkunku added two more quickfire goals on the stroke of half time.
Barca moved five points clear of second-placed Atlético Madrid, who won 2-1 at Alavés earlier, and lead Real Madrid, fourth, by nine po.