Boil the sweet potatoes, peel them, and mash them.
Add sugar and salt to the mashed sweet potatoes and mix well.
Sift cake flour and baking powder together and mix.
Add the sifted dry ingredients and milk to the sweet potato mixture and knead into a dough.
Divide the dough into equal portions, flatten each one, wrap a piece of chocolate inside.
Heat a little butter or oil in a pan and cook the sweet potato chocolate bread on both sides until golden.