Sweden took a first half lead through Arsenal's Freddie Ljungberg, after Larsson had come close to goal with a snap shot.
Stan Petrov was struggling to make a mark on the game but was holding the midfield steadily, until the roof caved in on the Bulgarians.
Two goals in a minute from The King, Henrik Larsson, put the game beyond doubt. Larsson's first was the goal of the tournament so far; a classy diving header which mirrored his first ever goal for Celtic, way back in 1997, against St Jonhstone.
Under a minute later, he nicked in at the back post to convert a tricky shot into the roof of the net.
Larsson passed up the chance to bag a hat-trick, when he passed the penalty taking duties to Ibrahamovic. But he got his first assist of the tournament in the dying seconds of the game, setting us Marcus Alback to complete the rout.
So, commisorations to Stan Petrov and Bulgaria, who are lying bottom of Group C but will hopefully bounce back.
But the night belongs to Henrik Larsson - still the King Of Kings.