Combine warm milk (about 105°F), 1 tablespoon of sugar, and the yeast in a small bowl.
Let sit for 5 minutes until bubbly and slightly sweet-smelling.
In a stand mixer with a dough hook, add bread flour, milk powder, salt, and remaining sugar.
On low speed, add the bloomed yeast, eggs, and tangzhong. Mix for 2-3 minutes.
Add softened butter and mix on low for another minute. Increase speed to medium-high and mix for 8 minutes until the dough forms a smooth ball. If too sticky, add more flour a tablespoon at a time.
Place dough in a greased bowl, cover with a towel, and let rise for about 1 hour or until doubled in size.