Blackwood, who made 20 saves in each of the second and third periods, has allowed six goals, one at even strength, on 115 shots in three starts (.947 save percentage).
"I don't really like to reflect on stats that much because when they're bad sometimes they're out of your control and when they're good sometimes you're getting bounces you wouldn't otherwise," Blackwood said. "It's all about how I feel. Right now, I feel pretty good."
The Devils and Rangers combined for five goals in the second period, three by New Jersey.
Kreider scored a power-play goal that went in off Devils defenseman Ryan Murray at 2:50 to tie it 1-1.
The first of Hughes' back-to-back goals came 1:23 later to give the Devils a 2-1 lead. The puck got behind Georgiev and stayed above the goal line long enough for Hughes to knock it in.
He made it 3-1 at 8:38, springing himself on a breakaway by blocking Jacob Trouba's shot with his shin pads before scoring on a backhand through Georgiev's legs.
"Some of it's luck," Hughes said. "Last year I was unlucky. This year, you look at this game today, the puck is just sitting on the goal line waiting for me. A puck off my shin pads, that could have bounced in the corner but it bounced right for a breakaway."
Zibanejad scored the Rangers' second power-play goal at 12:09, cutting the Devils' lead to 3-2.