Roughly chop the chocolate, dice the nougat. Warm the cream and coffee. Melt chocolate and nougat in it. Refine with liqueur.
Pour into a tall mixing bowl and place in the fridge for about 2 hours. Then whisk briefly with the whisk of the hand mixer. Pour into a piping bag with a star-shaped spout and squirt into soft-coloured chocolate bags. Decorate with small pearls and refrigerate for another 30 minutes