Coarsely chop 200 g dark chocolate and milk chocolate. Heat 400 g cream in a saucepan and remove from the heat. Dissolve the chocolate in it while stirring until an even, smooth chocolate mass is formed. Put the mixture into a mixing bowl, let it cool down and put it in a cool place for about 2 hours
Bring milk, fat, vanillin sugar and salt to the boil in a small pot. Mix the flour and cocoa, add to the pot at once and stir with a stirring spoon until the mixture conglomerates into a lump and a skin forms at the bottom of the pot. Put the dough into a mixing bowl, add 1 egg and knead with the dough hook of the hand mixer. Then stir in the remaining eggs one after the other. Let dough rest for about 20 minutes
Line 2 baking trays with baking paper. Place the grid on the bottom of the oven and place a flat, ovenproof dish with hot water on top. Put the choux pastry in a piping bag with a large perforated spout (14 mm Ø) and spray approx. 50 tuffs the size of a walnut onto the trays. Bake the trays one after the other in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 20 minutes. Cut open approx. 25 cream puffs hot and let them cool down. Allow the remaining cream puffs to cool and freeze immediately
Whip the chocolate cream with the whisk of the hand mixer until creamy. Pour into a piping bag with a large star-shaped spout and fill the sliced cream puffs with the chocolate cream. Chill for 20-30 minutes
Coarsely chop 100 g dark chocolate and melt it together with 100 g cream and coconut oil in a small pot at low heat while stirring. Let cool down for 10-15 minutes. Coarsely chop the white chocolate coating and melt it over a warm water bath and put it in a disposable piping bag. Cut off a small corner. Put a small blob of dark chocolate icing on each cream puff and decorate with some white couverture. Chill again briefly
Per filled cream puff:
waiting time 1 3/4 hours