Divide the croissant in half.
Whip the whip cream together with the vanilla sugar.
With a fork mix the almond paste with some of the whip cream.
On 1 croissant bottom place the almond paste, and on the other the vanilla sauce.
Use a piping bag to spread evenly the whip cream over the almond paste and vanilla sauce.
Place the top on each semla.
Sprinkle some icing sugar o top before serving.