Sprinkle soft plums with port wine. Cover and leave to stand for at least 2 hours. Knead marzipan with icing sugar
Roll out the marzipan in portions thinly (approx. 1 mm) on a work surface dusted with icing sugar. Cut out a total of approx. 50 circles (approx. 9 cm Ø), but knead, roll out and cut out marzipan remains again and again. Wrap each plum in 1 marzipan circle, press well. Place on baking paper. Let the marzipan dry for at least 2 hours
Chop the two types of envelope door separately. Carefully melt white couverture with 40 g coconut oil over a warm water bath (couverture must not get too hot). Dark couverture with 10 g coconut oil also
Dip marzipan plums one after the other with a fork into the white chocolate coating. Drain well and place on baking paper. Pour the dark chocolate coating into a piping bag. As long as the white couverture is still moist, draw lines across the pralines. Draw through with a wooden stick. Allow to dry
waiting time approx. 4 hours