Cohen returned from a long-term injury to play for Forest against Charlton Athletic away from home at The Valley at the weekend.
The 28-year-old midfielder came on as a substitute in the 86th minute on Saturday afternoon, as the Reds played out a 1-1 draw with the Addicks.
It was Cohen’s first appearance in 15 months, and Ephraim is happy to see the former Yeovil Town man back in action.
Ephraim, who is without a club at the moment, played with Cohen at West Ham between 2004 and 2006.
The 27-year-old, who can play as a winger or as a striker, has compared the Forest midfielder to Alejandro Faurlin.
Midfielder Faurlin, who has been on the books of QPR since 2009, has struggled with injuries in recent years. Ephraim played with the Argentine at Rangers and rates him highly.
Chris Cohen falls in the Faurlin category for me. One of the best I've played with & crazy mental strength to recover from their injuries— Hogan Ephraim (@HoganEphraim) January 2, 2016
Chris Cohen on the bench— Britt Assombalonga (@BrittOfficials) January 2, 2016