Sourdough Lussebullar

Today I saw snow!
SNOW! <3
It got me into a good Holiday spirit so I decided to make Lussebullar with sourdough, something I've never made. Of course I've made Lussebullar! But never have I added sourdough into the dough!
But right now I'm really into sourdough, and I know you can add sourdough into regular Cinnamon Buns so why not in Lussebullar?

Ingredients:
75 g melted butter
2,5 dl soy milk
25g yeast
1,5 dl sourdough
1,25 dl sugar
½ teaspoon salt
4 dl Manitoba Cream Flour
5 dl flour
Raisins or Marzipan or both


Preparation Instructions:
Crumble the yeast into a big bowl.
Melt the butter and add the soymilk(I heat the soymilk a little before in the microwave, if you add the soymilk directly into the melted butter it could clump, and it's not so fun)
I'd recommend you to use an digital meat thermometer, so that you can get an exactly 37 C, that's when you get the best result.
Pour the milk mixture over the yeast and stir till the yeast has dissolved, now add 0,5 g of saffron.
Then add the sugar, salt and 2 dl of regular flour and 2 dl of Manitoba Cream, and the sourdough, stir.
Now add 2 dl of Manitoba cream an stir.
Now add 3-4 dl flour with 1 dl at a time till the dough is smooth, it shouldn't stick to the bowl or to anything, but it should still be a little sticky to the touch, but the dough shouldn't stick to your fingers.
Now you have to let it sit for 30 minutes while it rises.
When it has doubled in size make buns! If you want to add marzipan into the dough, then take you marzipan and cut it into little pieces and knead it in.
I'm going to make half with marzipan and the other half with out anything.
The traditional shape is to make a rope of dough about six inches long (about 15 cm) and then form it into an S. Lay it on a wax paper and tuck raisins into the curls of the S.
Now, when you have done this with all the dough it has to sit for another 30 minutes. Now is a good time to put on the oven 225 C or 427 F.

After 30 minutes it's time to pop the first baking plate into the oven, but before we do that we can if you'd like, to brush the buns with a mixture of ½ dl liquid butter and ½ dl oat cream and then  just pop it in the oven.
Usually they should bake for about 8-10 minutes, but it depends on how big you've made them.