In a mixing bowl, combine flour, yeast, sugar, and salt.
In a separate bowl, whisk the egg with warm milk.
Pour the egg mixture into the dry ingredients and mix.
Add the softened butter and knead until the dough is smooth—about 10 minutes.
Cover and let rise for 1 hour in a warm spot until doubled.
Divide the dough into two balls. Roll each into a circle and cut into triangles like a pizza.
Roll each triangle from the wide end to the tip, forming crescents.
Place rolls on a baking sheet lined with parchment paper.
Let rise for another 30 minutes. Preheat oven to 180°C (350°F).
Mix egg yolk with 1 tbsp milk and brush over rolls.
Bake for 15–20 minutes until golden brown. Cool slightly before serving.