The spot-kick was awarded by referee Oliver after Mehdi Benatia was judged to have felled Lucas Vazquez in the box. Cristiano Ronaldo stepped and smashed the penalty kick past the visitor's substitute goalkeeper Wojciech Szczesny to seal the win.
It's laughable that the Italian refereeing designator said things are going well in the Champions League.
Like Real Madrid, Bayern Munich are accustomed to the latter stages of the Champions League.
Today Madrid could have scored more, but Buffon and the others did well.
'We should face and we did everything possible to go through, ' he said.
I have many friends there, every time I can I watch their games. "I'm happy and proud of how we played, we made the impossible possible".
The penalty came as Vazquez was in position to score in front of the goal after Ronaldo headed down a cross into the area.
Roma were 4-1 down from the away first leg of the quarter-final tie but won 3-0 in Rome to progress to the Champions League semi-finals on away goals.
Marcelo - the captain in the absence of suspended skipper Sergio Ramos - could not help himself from having a dig at Barca, who surrendered a 4-1 first-leg advantage in a stunning 3-0 collapse against Roma on Tuesday.
Blaise Matuidi made it level on aggregate after scoring from just a few inches from the goal line following Keylor Navas' blunder which saw the ball fumble out of his hands and Into the Frenchman's path.
Over in Italy, Corriere dello Sport go with the headline "what a robbery!" with a picture of the Juventus players surrounding referee Michael Oliver after the penalty decision.
Zinedine Zidane says he has no explanation for Real Madrid's sublime European form, suggesting only that LaLiga is a tougher competition to win.
Liverpool, however should be wary of the threat that Bayern Munich also poses under Jupp Heynckes, who has barely lost a game since taking over from Carlo Ancelotti earlier in the season.
"Since I've been here there's always been a bad performance in this competition and I always believed we would come through", Carvajal said.