Boil potatoes, mash them smoothly, and keep aside.
Mix warm milk, sugar, and yeast. Let it rest for 5–10 minutes until foamy.
In a bowl, combine flour, salt, mashed potatoes, and yeast mixture.
Add butter and knead into a soft dough.
Cover the dough and let it rise for 1–2 hours until doubled.
Shape the dough into a loaf and place it in a greased bread pan.
Let it rise again for 30 minutes.
Bake at 180°C (350°F) for 30–35 minutes until golden brown.
Cool before slicing and serve.