Boyhood fan Dan Burn set Newcastle on the road to their first League Cup semi-final for 47 years with his first goal for the club as stubborn Leicester finally wilted.
The £13 million January signing’s 60th-minute strike and a fine finish from Joelinton proved enough to secure a 2-0 quarter-final victory in front of an ecstatic crowd of 52,009 at St James’ Park and keep alive the Magpies’ hopes of a first domestic trophy since their 1955 FA Cup success.
Three days after a much-changed team was dumped out of that competition by League One Sheffield Wednesday, Eddie Howe’s men once again missed first-half chances but were not made to pay on this occasion.
"We knew this was important because we went out of the FA Cup, the lads were brilliant tonight," said defender Kieran Trippier.
"The supporters here are brilliant, they follow us in numbers and it's always a great atmosphere at home. We want to make them proud by giving everything on the pitch.
"It would mean everything to win a trophy but we just need to focus on the next game, take it one game at a time and now we look to the Premier League."
Toon might have been ahead within a minute of kick-off when, after Miguel Almiron had charged upfield from deep inside his own half and picked out Joe Willock on the left, he crossed for Sean Longstaff only to see his fellow midfielder scuff wide.
Bruno Guimaraes blasted a long-range attempt past keeper Danny Ward’s right post two minutes later with Almiron once again the instigator as the Magpies attempted to repeat the blistering start to their Boxing Day trip to Leicester which laid the foundations for a 3-0 Premier League win.
The visitors simply could not force their way into the game, with Patson Daka threatening sporadically on the break, although former Magpie Ayoze Perez did warm Nick Pope’s hands with a 14th-minute drive.
Guimaraes missed the target once again after Willock and Joelinton had linked well down the left, and it took a fine reaction save by Ward to deny Longstaff after his defence had failed to clear Trippier’s 19th-minute free-kick.
However, Trippier had to improvise to clear Daka’s low cross with a back-heeled flick after Timothy Castagne had countered and Pope raced from his line to prevent Harvey Barnes from connecting with Perez’s through-ball.
The home side rather lost their way as the first half drew to a close, although Almiron whipped a shot into Ward’s midriff and the keeper then palmed away another Guimaraes strike amid a late flurry.
Joelinton’s low drive come back off the foot of the post within seconds of the restart, but Youri Tielemans saw his 50th-minute shot deflected over as the visitors responded.
Burn headed Trippier’s free-kick over when he might have done better and Ward denied Longstaff once again, but Burn’s moment finally arrived as the clock reached the hour mark.
The 6’6” full-back burst into the penalty area from the left after the Foxes had conceded possession cheaply and fired across Ward and inside the fire post to send the home crowd into raptures.
It was 2-0 within 12 minutes when Joelinton provided the perfect finish to Almiron’s perfectly-weighted pass, although substitute Jamie Vardy passed up two glorious opportunities to reduce the deficit in quick succession as the home side slept.
Leicester boss Brendan Rodgers told the BBC: "The best team won. We are disappointed with the goals we conceded. We gave away two soft goals. We lacked quality in our play if I'm honest but the players gave everything.
"We had a few chances in the game, good chances we could have scored from but if you don't take those opportunities it is tough."
