These muffins are so delicious and will fill your mouth with the aroma and flavor of sweet potatoes and cinnamon. They taste like sweet potato cakes.
I've been making these for a long time.
When adding the cake flour, add in batches, mixing in a little at a time, but lightly fold after adding the last batch. They are ready when a skewer inserted into the middle comes out clean.
Enjoy Japanese food around the world.