Preheat oven to 180 degree C.
Melt white chocolate and butter in microwave till it is melted.
Now Set aside to cool.
Take egg in a bowl add icing sugar and whisk till little frothy.
Add vanilla and salt. Add chocolate mix and flour and fold gently.
Spoon this into greased ramekins and bake for 10 to 12 mins.
Remove and cool completely.
UNmould and serve.