Game one between the Chicago Blackhawks and Philadelphia Flyers has been an offensive explosion, with 11 goals scored between two teams with eight minutes still left to go in the 3rd period.
According to Hockey-Reference.com, in only six games in the Stanley Cup Finals / NHL finals history have there been more than 11 goals scored between two teams in a single game. The record of 15 goals belongs to Game 5 of the 1973 series between the Blackhawks and the Montreal Canadiens, with the Blackhawks beating the Canadiens 8 to 7.
There have been 13 goals scored in one Stanley Cup Finals game just once, in game 2 of the 1936 series where the Detroit Red Wings defeated the Toronto Maple Leafs, 9 to 4.
The series in 1919, 1942, 1962, and 1981 all have had a game with 12 total goals scored between two teams in the Stanley Cup Finals.
The current score of 11 goals is tied with seven other games, in 1992, 1985, 1982 (OT), 1980, two games in 1973, and 1972.