In a bowl of a stand mixer, add yeast, sugar, and warm water, and whisk well. Let it sit for 5 minutes.

Add bread flour, dried milk, and salt to the mixer bowl, and knead for 7-8 minutes with a dough hook. Then add soft butter and knead for another 7-8 minutes.

When the dough becomes smooth, make it into a ball, then let it rise covered with plastic for about 1 hour or until doubled.

Divide the dough into 4 pieces, make into balls, and put them in the pan side by side. Let it rise again about 45 minutes, covered, or until the dough rises to 3/4 of the height of the pan.

Bake in the oven for 45 minutes. Remove immediately from the pan.