In a large bowl, dissolve the yeast in warm water with a teaspoon of sugar. Let it sit until frothy, about 5 minutes.
Add the remaining sugar, salt, vegetable oil, milk powder, and half the flour. Mix until smooth.
Gradually add the remaining flour, kneading until the dough is soft and elastic, about 10 minutes.
Place the dough in a greased bowl, cover with a damp cloth, and let it rise in a warm place until doubled in size, about 1 hour.
Punch down the dough and shape it into a loaf. Place on a parchment-lined baking sheet.
Preheat the oven to 350°F (175°C).
Let the dough rise again until nearly doubled, about 30 minutes.
If using, brush the top with beaten egg white for a glossy finish.
Bake in the preheated oven for about 30 minutes or until the top is golden brown and the loaf sounds hollow when tapped.
Remove from the oven and let cool on a rack.