Shortly after the power play ended, Korpisalo stopped a breakaway by William Nylander.
"You saw the game, [Korpisalo] was excellent," Larsen said.
Engvall increased the lead to 2-0 at 7:49 of the third period, scoring his 11th goal on a one-timer from the right face-off circle after a cross-ice pass by Morgan Rielly.
"We didn't make it on the number of chances that we had to extend our lead, but within that I thought we played a pretty solid and patient game," Maple Leafs coach Sheldon Keefe said. "We didn't give up a lot and extended our lead in the third period, which is what you want to do."
Tavares scored at 8:38 with a wrist shot from the slot for the 3-0 final.
"We didn't cheat for offense, especially when we got the lead," Marner said. "I thought we played the same way throughout the game and got rewarded for it at the end. If we can play that way for 60 minutes, we're a hard team to beat."