The Blues found themselves 0-1 down early on at Turf Moor, but they responded positively to claim a 3-1 victory in their Premier League opener.
"We had a good reaction," Mourinho told the club's official website. "The first part of that reaction was that we were not emotionally affected by the goal we conceded.
"We kept playing according to the way we are training and the way we want to play. The players were very calm and never lost their composure. They never lost the football idea."
Chelsea continue their Premier League campaign on Saturday when they welcome Leicester City to Stamford Bridge.