Prepare the Dough:

Pour 150 ml warm milk into a large bowl and sprinkle in the yeast. Let the mixture sit for 5 minutes to activate the yeast.
Add the flour, powdered sugar, salt, and milk powder to the bowl. Mix well until combined and a sticky dough begins to form.
Knead the dough by hand or with a mixer until it becomes smooth and elastic (about 8-10 minutes).
Incorporate the Butter:

Add the butter to the dough and continue kneading until it is fully absorbed and the dough is soft and shiny.
First Rise:

Cover the dough with a clean kitchen towel or plastic wrap and let it rise in a warm place for 1 hour, or until it doubles in size.
Shape the Bread:

Punch down the dough to release air and divide it into 4 equal parts. Shape each piece into a loaf or desired shape as per your preference.
Place the shaped dough onto a greased or parchment-lined baking tray or loaf pan.
Second Rise:

Let the shaped dough rest for 15 minutes to rise slightly.
Prepare for Baking:

Preheat the oven to 170°C (340°F).
Brush the dough evenly with the egg yolk and sprinkle sesame seeds on top for a decorative finish.
Bake:

Bake the bread for 25 minutes, or until golden brown and fully cooked.
Remove from the oven and let it cool slightly before serving.
5 Serving Suggestions:

Serve warm with butter and jam for breakfast.
Pair with a hot cup of coffee or tea.
Use as a base for sandwiches or sliders.
Enjoy with soups or stews for a comforting meal.
Toast slices and drizzle with honey for a sweet treat.