Preheat oven to 350°F/180°C. Line a baking tray with a baking mat or parchment paper. If you dont have them, just grease the baking tray nicely with oil or butter.
After the first proofing the dough will double in size. Gently deflate the dough and turn out onto a cleaned surface.
Divide the dough in two and roll them out with a rolling pin into a 2-3 mm rectangle sheet.
Transfer one of the rolled sheet to a parchment paper and cut into a triangle tree shape using a knife or pizza cutter.
Now on the shaped tree evenly spread the jam. Sprinkle some cinnamon powder. Spread the chocolate chips all around the tree.
Place the second sheet over it. Trim edges into a triangle shape.
Reserve the trimmings, you can make one more tree out of it. When working with the dough, just keep it covered with a moist cloth to keep it from drying out.
Cut strips of dough and twist gently, pinching the dough firmly together to seal closed.
Make a star with the trimmings and place it on top of the tree.
Cover the prepared tree and let it rest for 25-30 minutes.
Brush the tree nicely with milk wash and bake at preheated oven @180°C for 18-20 minutes or until the tree just begins to brown.
Once out of oven grease butter immediately and cover it with a cloth and stand for 5-10 minutes.
You can dust it lightly with powdered sugar, it looks beautiful. Enjoy it warm or after cooling down completely.