Nobody saw this coming.
The Packers dominated the first half, outscoring the Cowboys in every phase and taking a 27-7 lead into the locker room at halftime.
Green Bay outgained Dallas 217 yards to 150, with two picks from Dak Prescott leading to 14 points.
Jaire Alexander, who was unable to play after suffering a freak ankle injury in practice, intercepted Prescott on a pass intended for Brandin Cooks at the Dallas 19. Three plays later, Aaron Jones had his second touchdown run of the day.
With 1:50 left in the half, Darnell Savage made the Cowboys' day even worse with a 64-yard pick-six from Prescott on a pass intended for CeeDee Lamb. That gave the Packers a 27-0 lead.
Prescott only threw nine interceptions in the regular season.
The Packers also had scoring drives of 75 and 93 yards and converted five of six third-down plays in the first half.
Jordan Love was 13 of 16 for 185 yards and a touchdown, a 20-yard throw to Dontayvion Wicks, and Romeo Doubs has four catches for 102 yards. Aaron Jones rushed for 30 yards on 12 carries.
The Cowboys didn't get on the scoreboard until the final play of the half after a 1-yard throw from Prescott to tight end Jake Ferguson. A 47-yard kickoff return by KaVontae Turpin ensued a 12-play, 55-yard drive.
Prescott is 13 of 21 for 87 yards with one touchdown and two interceptions. Lamb has just two catches for 18 yards while Ferguson has four for 31 yards. Tony Pollard rushed for 30 yards on eight carries.
Cowboys coach Mike McCarthy, who previously led the Packers to a Super Bowl victory, could have his job coached in the second half. Despite posting 12 wins in three straight seasons, he was just 1-2 in the postseason today after losing at home to the 49ers in the wild-card round two years ago.