Wash the sweet pumpkin thoroughly, remove the skin and seeds, then steam it.
Mash the steamed sweet pumpkin until smooth.
Mix flour, sugar, salt, and yeast in a large bowl.
Add the mashed sweet pumpkin, milk, and butter to the bowl and knead into a dough.
Let the dough rise for the first fermentation.
Shape the dough as desired and place it on a pan.
Let the shaped dough rise for the second fermentation.
Bake in a preheated oven at 180°C for 20-25 minutes.