The teenage duo impressed for Alan Pardew's side during their Capital One Cup victory over Manchester City.
That was not the first time they starred for the Magpies, however, with 18-year-old Aarons scoring his first Premier League goal against Crystal Palace earlier this season and 17-year-old Armstrong starring against the same side in the cup.
Newcastle face the Reds later today and their former defender has seen enough from the pair to believe Pardew will give them plenty of chances going forward.
"Given the passion for football in the area, it has been a mystery to me that Newcastle’s teams have gone without home-grown talent for so long," Carragher wrote in his weekly column for the Daily Mail.
"We might have had a glimpse of the future, though, at the Etihad Stadium on Wednesday night when a youthful and inexperienced team knocked the holders out of the Capital One Cup.
"It would be naive to think those who helped defeat Manchester City - such as 17-year-old Adam Armstrong and 18-year-old Rolando Aarons - will all become fixtures in the team in the coming weeks on the back of one excellent result.
"But they have given themselves a great chance of having a long-term future at the club and I’m sure Alan Pardew will look to reward them with more opportunities going forward."