1. Prepare the butterscotch blancmange according to packet instructions and let it cool completely. 2. In a blender, combine the butterscotch blancmange, two scoops of vanilla ice cream, and additional milk if needed to reach your preferred consistency. 3. Blend until smooth and creamy. 4. Divide between 2 glasses and serve topped with squirty cream and a drizzle caramel sauce.