The Wales international's first goal was sublime and in many ways reminiscent of his manager Zinedine Zidane's goal which won the 2002 final, but his second was pure comedy as Karius let a 30-yard strike slip through his fingers.
A move back to the Premier League to Manchester United remains a possibility for a player who will be 29 in July, but for those who doubt Bale's ability to have an impact for Real, he showed in emphatic style that he remains a world-class player with his supersub display against Liverpool.
The match had implications for the upcoming World Cup in Russian Federation, with Liverpool's Egyptian star forward Mohamed Salah leaving the game in tears with a shoulder injury just seven minutes before Real lost Spanish right-back Dani Carvajal to injury.
Gareth Bale stunner and goalkeeping howler see Real Madrid crowned European champions again. In contrast to Karius, the underrated Keylor Navas made a series of important saves and catches to keep Liverpool out before Real scored.
Navas is a world-class goalkeeper and he has now won three Champions Leagues, but it is debatable whether Liverpool will win one with Karius in goal.
"I had an injury five, six weeks into the season but I've been fit ever since", added Bale.
Jurgen Klopp's and Liverpool's own evening was marred by the loss of a distraught Mohamed Salah to injury in the first half, the Egyptian coming off half an hour in having damaged his shoulder.
"I need to be playing week in week out, that has not happened this season".
"It's a really serious injury", said Klopp.
The goal was still being debated when Mane equalised from close range four minutes later, after Lovren's header from a James Milner corner.