The Eagles' first goal came after 22 minutes, when James Scowcroft won a penalty that was converted by Ben Watson.
In the second half, Shefki Kuqi took advantage of a defensive mix-up to put the result beyond doubt.
As in the previous friendlies, boss Peter Taylor used a different side in each half of the match, with a number of youngsters getting the chance to play.
Palace first half
Speroni, Lawrence, Hall, Hudson, Swaibu, Kennedy, Watson, Green, Martin, Scowcroft, Kudjodji
Palace second half
Flinders, Butterfield, Craig, Cort, Carolan, Fletcher, Soares, Ifill, Dayton, Freedman, Kuqi.