Prepare ingredients such as flour, sugar, salt, and yeast.
Dissolve yeast in warm milk.
Add milk, sugar, and salt to the flour and knead the dough.
Let the dough rise for the first fermentation.
Mix crumb (Soboro) ingredients to make the crumb topping dough.
Shape the fermented dough into balls and place the crumb topping on top.
Let the dough rise again.
Bake in a 180°C oven for 15–20 minutes.