After consecutive wins for the young Foxes, against Brighton & Hove Albion and Southampton respectively, they travelled to south London to face the Eagles in league action at Crystal Palace Training Ground.
The hosts were two goals up by 11 minutes, after goals from Zach Marsh and David Obou. The Foxes did claw one back in the 16th minute through Josh King, who was assisted by Jayden Joseph.
Against a team currently second in the standings, the result keeps Leicester eighth, with 19 points, and seven above bottom-placed Norwich City.
However, second half goals from Marsh, Obou and Anthony Dixon rounded off the scoreline as City now look ahead to their league fixture against Arsenal at Arsenal Training Centre on Tuesday 28 March with an 11:30am GMT kick-off.
The details...
City: Addai; Cook, Grist, Gray; Joseph, Briggs (Fisken 67'), Lewis, Ali; Nyoni (Ononaye 74'); King (Otchere 74'), Richards (Thomas 81').
Sub not used: French.
Goal: King 16'.