1.Preheat oven to moderate, 180°C. Line 8 recesses of a muffin pan with 2 strips of baking paper, crossing at the centre.
2.In a bowl, combine biscuit and butter, mixing wall. Press firmly into the base or each recess. Chill for 20 minutes.
3.In a bowl, using an electric mixer, beat cream cheese with sour cream, yoghurt, sugar, eggs and vanilla until smooth. Fold in 3/4 of the crunchie bar. Pour evenly into prepared muffin pan.
4.Bake for 20-25 minutes until firm. Cool completely in pan, then chill until required. Some topped with cream and reserved crunchie bar.
This could also be made with Flake, Picnic or Mars Bar.