Swedish Cinnamon Buns with Custard Filling

Method

1. In a large bowl, combine flour, sugar, salt, and yeast.
2. Add the cold cubed butter and mix until the texture resembles coarse crumbs.
3. In a separate bowl, whisk together warm milk, egg, and a little water to activate the yeast.
4. Gradually add the wet ingredients to the dry mixture and knead until a smooth dough forms.
5. Cover the dough and let it rise in a warm place for 1 hour.
6. Divide the dough into small portions, roll each into a ball, and flatten into a disk.
7. Add a spoonful of custard filling to each disk, fold the dough over, and shape into a bun.
8. Place on a baking sheet, let them rise again for 30 minutes, and brush with the egg yolk glaze.
9. Bake at 180°C (350°F) for 15-20 minutes until golden brown.