Prepare the cake batter by mixing ingredients including mix flour, sugar, eggs, butter, milk, and baking powder, you can add any other flavor like vanilla, chocolate, or strawberry.
Then in a small mold pour the batter but grease it before so that it does not stick and then bake it at 170 degrees Celsius for 20-25 minutes.
After it cools completely use a round cutter and add frosting between the layers of circles you have cut.
Then create a frosting of whipped butter, powdered sugar, and vanilla essence and make a smooth and creamy textured frosting.
Then cover the mini cake with the frosting with the help of a spatula so that it evenly spreads.
Write messages, pipe some cute messages or objects, and add colorful sprinkles or edible pearls for a cute and fun touch to your bento.
Place the cake in a small bento box for proper bento cake presentation and enjoy it.