The Forest skipper has been discussing his side's youngsters.
Under Football League rules, Forest are one of three clubs not allowed to sign new players during the transfer window, although there may be certain loopholes - especially when it comes to loan signings.
But Cohen, the club's injured captain, believes the transfer embargo provides the perfect opportunity for youngsters to come to the fore at Nottingham Forest.
Ben Osborn is one such player to have jumped at the chance to shine for Stuart Pearce's side - and Cohen feels the rest of Forest's young contingent should take note.
“With the transfer embargo at the moment we need our young players to be coming through and showing that they are capable of not just playing a few minutes here and there - but a big part going forward," the 27-year-old said.
“It’s an unbelievable opportunity for them. They’ve got to see this as an opportunity and grasp it in the same way Benny [Osborn] and Jorge Grant have."
Nottingham Forest's disappointing season to date appears to have re-entered reverse gear, with Pearce's side's win over arch rivals Derby County only providing a brief respite for the Championship club.
Osborn scored a late winner for Forest during the comeback win over Derby but, despite an Henri Lansbury double, the Midlands side lost 3-2 to Fulham during midweek.
Nottingham Forest's next league clash comes at Millwall on January 31st.