In a food processor, processor cookies until fine crumbs
Dump cookies onto 8inch spring form pan
Pour melted butter, mix, and pat firmly
Bake on preheated 325 F for 5 mins
Meanwhile, beat cream cheese with sugar until completely combined
Beat in 3 eggs, one at a time, until completely combined
Beat in the last egg, until just combined
Divide batter into three
Melt choc chips on 30 secs intervals in microwave
Add vanilla essence to one, peppermint extract to another and melted choc chips to the last
Add food coloring, red to one, green to other, leave the last as is
Drop spoonful of each batter, alternating each time, creating marble effect
Bake on preheated 325 F until center is almost set, at least 40 mins
Run a knife on sides, cool on rack inside the pan to room temperature
Chill cake still in the pan for at least 4 H, best overnight, before serving