Wash the sweet pumpkin thoroughly, remove the skin and seeds, and steam it.
Mash the cooked pumpkin well and let it cool.
Combine flour, sugar, yeast, and salt in a bowl and mix.
Add the mashed pumpkin, milk, and butter, then knead the dough.
Knead until the dough is smooth and let it rise for the first proof.
Divide the dough and shape into balls.
Place the dough balls on a pan and let them rise for the second proof.
Bake in a preheated oven at 180°C for 20 minutes.