Put all the ingredients in the pot and mix with a rubber spatula.
Once mixed, use your hand to create a uniform thickness. It's easy if you use the palms of your hands.
Set up your rice cooker and cook. Once it's finished, cook again in the cooker.
Once it's done, flip the rice cooker pot and plop the cake on a rack.
Once cooled, wrap in a plastic bag or plastic wrap and leave overnight in the refrigerator.
Top with powdered sugar and it's complete.
Story Behind this Recipe
I wanted to make a simple yet healthy cake out of okara.
The trick is to mix the ingredients well and make sure it's a uniform thickness. It's very simple and you won't fail, so give this a try. How about making heart shapes with a cutter and making this for Valentines Day?