Line a 9"x9" square baking pan or a 20cm round cake pan with non stick paper or grease with non stick cooking spray and set aside.
Crush the Oreos and mix with the melted butter. Press into the base of the prepared pan and place in the fridge while you make your cheesecake filling.
Cheesecake Filling;
Lightly whip the cream in a bowl until soft peaks form and set a side
Beat the softened cream cheese until no lumps remain.
Beat in the icing sugar and vanilla extract and beat until smooth.
Add in the lightly crushed Oreos and whipped cream and beat until just combined.
Pour over the Oreo crust and spread into an even layer.
Allow to set for at least four hours but it tastes better if it has rested overnight.
Before serving, decorate with crushed Oreos, a chocolate drizzle, whipped cream and mini Oreos if you want. Or decorate however you desire.
I decorated by sprinkling a touch of crushed Oreos over the top of the cheesecake and then drizzling some melted chocolate over that.
Then I piped blobs of whipped cream (with vanilla extract and icing sugar beat in with it) in even spaces over the cheesecake and placed a mini Oreo in the middle of each cream blob.