Facing a dip in form with three losses in their last five Premier League games, Mikel Arteta’s squad underwent a week-long winter break in Dubai, returning with renewed energy.
The Gunners secured a decisive victory with a Gabriel header, an own goal by Dean Henderson, a composed finish by Leandro Trossard, and two late strikes from Gabriel Martinelli.
The opening goals originated from corner kicks, with Gabriel nodding in the first in the 11th minute.
Henderson’s unfortunate deflection from another set-piece extended Arsenal’s lead.
Crystal Palace struggled to mount a response, allowing Trossard to calmly convert a one-on-one opportunity in the second half.
With the visitors firmly defeated, Martinelli embellished the triumph with two injury-time goals, both elegantly placed into the far corner.
This victory propels Arsenal to third place, trailing leaders Liverpool by two points, albeit having played one more game.
Crystal Palace remains in 14th position, their only year-end league win narrowly against Brighton, while facing defeats against Aston Villa, West Ham, and Fulham.