Blitz the cookies in a blender or food processor until finely ground. Tip into a bowl, then stir in the melted butter till the mixture clumps together when you press it between your fingers. Depending on the cookies you use, you might need to add a few more, if the mixture looks too buttery.
Transfer the mixture to an 8" springform tin and press it down firmly and evenly over the base, and taking it up to the sides if needed (this makes a thin crust, if you'd like a thicker, taller crust, double the cookies and butter).
Place the tin in the fridge to chill while you make the filling. Preheat the oven to 160 C.
In a mixing bowl, beat the cream cheese, yoghurt, sugar and cookie butter until smooth and creamy. Avoid over-mixing it as too much air will lead to cracks in the cheesecake.
Add the eggs and vanilla and beat to combine.
Pour the mixture over the chilled crust and bake for 20 to 25 minutes until the centre is still wobbly, and the edges are lightly browned. Let the cheesecake cool in the oven itself for about an hour and you will notice it firms up on its own.
Let the cheesecake cool, uncovered, at room temperature, then transfer to the fridge to chill at least overnight, if not a whole day.
Remove the edges of the springform tin and spread some melted cookie butter on top of the cheesecake. Using a sharp knife, slice into pieces, wiping the knife in between each cut for neat slices. Serve immediately! Keep stored and covered in the refrigerator at all times, it will last about a week. Happy baking!