This recipe for a moist and rich chocolate banana cake can be made in just 3 minutes in the microwave, without using any wheat flour. It's incredibly easy to make, requiring only five ingredients: bananas, eggs, sugar, kinako (roasted soybean flour), and cocoa powder. Simply mix and microwave. It's so easy you can even make it in a mug, making it a great way to use up leftover kinako from the New Year holidays. A healthy and delicious treat perfect for breakfast, a snack, or enjoying at home.