This can be made with one bowl. The melted butter is added at the end, so that there is no need for an electric mixer. The tartness of the apple is really nice.
I bought a lot of apples since they were in season. They were ripe and I wanted to use them. I had butter, so I made pound cakes.
The batter rises easily and evenly when you shift the dry ingredients three times. You could do it twice but... Keep the cut apples in a colander so that it won't be watery.
Enjoy Japanese food around the world.