Stir in the melted butter and warm milk to form a soft but not sticky dough. Turn the dough out onto a surface lightly dusted with Mix and knead until smooth and the fruits are evenly distributed. Lightly roll the dough into a rectangle.
Roll the marzipan into a sausage shape and lay it down the middle of the dough.
Roll the dough around it and squeeze the ends to neaten the shape. Place on a lightly oiled baking tray and leave to prove in a warm place for approx 30 minutes, then bake in a preheated oven (200°C/180°C/400°F/Gas Mark 6) for about 20-25 minutes until golden brown. Allow to cool slightly.
For the icing, by sift the icing sugar into a bowl and mix with just enough lemon juice to form a stiff icing. Drizzle over the top of the stollen while it is still warm.