01 - 
                In a large bowl, whisk together warm milk, active dry yeast, granulated sugar, and vanilla sugar until yeast is dissolved.
              
              
              
                02 - 
                Add egg yolks and yogurt to the yeast mixture and whisk until fully combined.
              
              
              
                03 - 
                Gradually add all-purpose flour while mixing with a spatula until a soft dough forms. Incorporate salt.
              
              
              
                04 - 
                Add melted butter and knead the dough in the bowl for 1–2 minutes. Transfer to a floured surface and knead 5–7 minutes until smooth and elastic.
              
              
              
                05 - 
                Grease the bowl, return the dough, cover with wrap or lid, and let rise in a warm place for 50–60 minutes until doubled in size.
              
              
              
                06 - 
                Divide the dough into 9 equal portions (about 109 g each), shape into balls, and let rest under a towel for 10–15 minutes.
              
              
              
                07 - 
                Blend cream cheese, egg, and sugar until smooth. Transfer to a piping bag.
              
              
              
                08 - 
                Roll each dough ball into a 17–18 cm circle, brush lightly with melted butter, cut into strips, stack, make a central depression with a stick, cut diagonally, and roll into spirals.
              
              
              
                09 - 
                Place shaped rolls on parchment-lined tray. Pipe cheese filling into the center of each roll.
              
              
              
                10 - 
                Whisk egg yolk with milk and brush over the rolls. Optionally mist lightly with water.
              
              
              
                11 - 
                Bake in a preheated oven at 180°C (360°F) for 24–26 minutes until golden brown. Let cool slightly before serving.