This is a simple recipe for a rich banana cake using rice flour, made in a microwave and toaster. Mash the bananas, add sugar, vegetable oil, and egg and mix well. Then add baking powder and rice flour and mix until there are no lumps of flour. Pour the batter into a heat-resistant container and heat in the microwave. After that, brown it in a toaster to give it a crispy exterior and a moist, fluffy interior. Since it uses rice flour, it is gluten-free and easy enough for beginners to make, making it perfect for snacks, breakfast, or as a gift.