Reduce wine to 350 ml and allow to cool. Cut chocolate into pieces as small as possible.
Bring milk with dextrose to a boil, add chocolate and stir to dissolve in milk. Add wine and stir until smooth. Gradually stir butter into mixture. Pour mixture into a bowl, cover with plastic wrap and refrigerate for 1 hour.
Line a small plate with a piece of baking paper. Using a small spoon, cut out equal-sized dumplings from the chocolate mixture. Shape into smooth balls, place on the plate and refrigerate for 3 hours.
For the garnish, coarsely grate chocolate shavings, roll the truffles in them and place on a plate.
Preparation Tip:
Depending on your taste, you can also roll the truffles in finely sifted powdered sugar (powdered sugar) instead of chocolate chips.