Peel the sweet pumpkin, remove the seeds, boil it, and mash it.
Put flour, yeast, sugar, salt, milk, and eggs into a bowl and knead the dough.
Add the mashed sweet pumpkin and butter to the dough and knead until smooth.
Cover the dough with plastic wrap for the first fermentation.
Divide the dough into appropriate sizes and shape into rounds.
Place the shaped dough onto a pan for the second fermentation.
Bake the dough in a preheated oven.