Bring to a boil on medium heat the milk, sugar, cocoa, raisins and butter together. Boil for 30 seconds. Turn off the heat and prepare the biscuits.
Break the biscuits into small pieces in large bawl. Add the flavored extracts to the cocoa syrup and pour the hot liquid over the biscuits. Mix well so they are all covered by the syrup and starting to absorb the liquid. Let aside until you take care of the Turkish delight.
Cut the Turkish delight in small pieces. Add it to the biscuit mixture. Add the chopped and ground walnuts too. Stir well to incorporate all things together.
Place this mixture onto a parchment paper (or cling film) and give it a 'salami' form. Wrap it very tight with the parchment paper into this salami form and secure the ends.
Place it into the fridge and let it rest until firm, about 4-5 hours. Overnight is better.
Unwrap and coat with icing sugar. Slice and serve with a cup of coffee or your favorite tea.
Notes
This is a relatively firm dessert when set overnight. If you prefer a bit moist texture, add 50-70 ml extra milk. Turkish delight has also a very strong, sweet flavor. Keep that in mind when replacing with other dried/candied fruits.