The first title of the season
An excellent header from Xavi and a spectacular double from Portugal international Deco gave Frank Rijkaard's side a 4-0 aggregate triumph over the King's Cup winners.
As we already know, Ronaldinho's team also won the Super Cup last season, and have now won the trophy seven times, the same total as arch-rivals Real Madrid.
We must mention that they will have the chance to add another title to their collection when they play UEFA Cup winners Sevilla in the final of the European Super Cup in Monaco on Friday.
"I think it was the perfect way to start the season," Deco told reporters after the match. "It was very good to score four goals and win without having to suffer too much."
in fact, the first leg was marred by controversy over the participation of Barcelona duo Carles Puyol and Xavi just three days after they had withdrawn from Spain's friendly with Iceland because of an injury, with Espanyol claiming their inclusion had breached FIFA rules.
However, there was little Espanyol could do to stop Barca on the pitch and with Ronaldinho Gaucho and Xavi pulling the strings in midfield the home side were in scintillating form in the opening 20 minutes.
They opened the scoring after four minutes when Xavi sent a glancing header spinning into the top corner after Ronaldinho had dinked the ball across the area after bamboozling Espanyol defender Sergio Sanchez with a mesmerising step-over.
And ten minutes later Deco made it 2-0, steering a low shot past Kameni after fullback Juliano Belletti had cut back a superb pass from the byline when he had raced on to a fine through-ball from Xavi.
With the victory assured, Barca eased up and Espanyol were able to stem the tide until early in the second half when Deco added a third with an overhead kick after another great cross from Brazilian midfielder Belletti.