[Bread dough] Place all ingredients except butter in a bowl and knead for 5 minutes using hands or a kneader.

Add butter and knead smoothly for 15 to 20 minutes when the ingredients are agglomerated.

Cover the dough with plastic wrap to prevent it from drying, and first ferment in a warm place (40) for 50 minutes.

Make [sweet potato filling] during the first fermentation.
Mash steamed sweet potatoes finely when they are warm, then add sugar, milk and butter and mix well.

After the first fermentation (please check if it is 1.5 to 2 times).

After the first fermentation, divide the dough into 7 pieces and round it.

Cover with plastic wrap and let it ferment for 15 minutes.

After medium fermentation, remove the dough from each dough to make ears (5g x 2) and nose (3g).

Press the dough flat with your palm and cover it with 30g of sweet potato filling. Then press the top slightly flat.

Make the ears into a triangle and attach them, and make the nose flat in an oval shape and attach them. Then make your nostrils with chopsticks or straws.

Cover the dough with plastic wrap to prevent it from drying and ferment it in a warm place (40) for 30 minutes.

After the second fermentation, evenly coat the surface with egg water. Then poke a hole with a toothpick in the area where the eyes are to be expressed, and stick the chocolate chip on.

Bake for 10 minutes in a preheated oven at 170.