We will start with making the buns by crumble the yeast in a bowl.
Melt the margarine in a casserole. Add the milk and let it become finger warm in temperature.
Take away the casserole from the stow and add it in the bowl with the yeast and stir gently until it is lump free.
Add the sugar, salt, cardamom powder and almost all the flour. Work it in to a smooth dough. Might need to add more flour if necessarily.
Place a towel on top of the bowl and let it rest for minimum 30 minutes.
Time to prepare the filling. With a fork mash the margarine, add the cinnamon and the vanilla sugar and mix well.
Roll out the dough approx. double the size of your baking sheet but the same width.
Spread the filling evenly on the dough.
Fold 1/3 of the dough from the short side towards the middle, then take the other side and fold on top of it from the short side.
Place a towel over the dough and let rest for 30 minutes.
Preheat the oven at 220 degrees Celsius.
Cut the dough in squares and brush with the egg.
Place the buns in the middle of the oven for approx. 10 minutes.
Take the buns out from the oven and let rest for 5 minutes.
Melt the margarine for the topping and brush on the buns. Sprinkle the decorating sugar on top.