Pour the melted white chocolate in silicon moulds and give it a good swirl to coat it all around.
Flip to pour out the excess white chocolate and refrigerate the mould to let the chocolate set.
Meanwhile, to make the filling, take the cream cheese, white chocolate, rose syrup, cardamom powder and whipped cream in a bowl. Using an electric beater, whip it till nicely combined and holds its shape.
Transfer the mousse filling into a piping bag fitted with a star nozzle.
Carefully, demould the white chocolate cups and pipe the mousse filling inside them.
Garnish with dried rose petals and silver leaf.
Recipe by Bake with Shivesh at https://bakewithshivesh.com/rose-and-elaichi-mousse-cups/