Pour caramelized sugar into 2 – 6X2 inch lyanera pan.
Tilt pan until bottom is well coated with the caramel.
Combine all the ingredients for custard until well blended, then pour onto caramel lined pan.
Prepare cake as per package direction then pour batter mixture slowly on top of custard.
Bake in Baine marie then bake for 30-35 minutes at 375°F/ 191°C, slightly cool then invert upside down.