The following day, remove the bowl from the fridge and leave it to come up to room temperature for 2 hours.
Knock the dough back and divide it into two equal pieces (I use a scale for accuracy).
Roll each ball of dough out on a lightly floured surface to a rough rectangle about 1 - 1 ½ cm thick.
Divide the marzipan in half and roll each half into a log a little shorter than your dough rectangles. Place the marzipan logs just off centre on the dough.
Fold the smaller half of dough over the marzipan then fold the other half over the top and press gently to seal. Make sure that the ends are also sealed.
Place the logs well spaced apart on a greaseproof paper lined baking sheet and loosely cover. Set aside to rise in a warm place for 3-4 hours until they have increased in size by 50%. They will not double. Meanwhile preheat the oven to 180°C/350°F/gas mark 4.
Once the logs are puffy, bake them for 40-45 minutes until the internal temperature reaches at least 94°C/201°F on a probe thermometer. If they start to become too dark before they are ready you can loosely cover them with tin foil.
Once the stollen are baked, remove the logs from the oven and let cool for 10 minutes. Remove any raisins from the surface as they will be burnt and bitter.
Brush the stollen generously with the melted vegan butter and leave it to set.
Once the butter has set, sprinkle them with a thick layer of sifted icing sugar and leave to cool completely.
Once the stollen are completely cold, wrap them first in a layer of baking parchment then a layer of tin foil and store in a cool, dry place for up to six weeks.