Wrap the tofu in a kitchen towel to remove moisture.
Add the tofu, honey, and vanilla extract to a blender and blend until smooth to make a cream.
Brew strong coffee and let it cool.
Soak castella cake or ladyfingers in the coffee.
Lay the soaked castella cake in a container.
Top with tofu cream and sprinkle cocoa powder.
Repeat the layers 2 to 3 times.
Let it set in the refrigerator for at least 2 hours.