For the base:
200g malted milk biscuits
100g Maltesers
100g unsalted butter, melted
For the filling:
550g cream cheese, softened
100g Ovaltine or other malted drink powder
100g white chocolate, melted and cooled
100g milk chocolate, melted and cooled
Pinch of salt
100g Maltesers, crushed
300ml double cream
Maltesers for garnish (or fresh raspberries)