This is a simple recipe for castella pancakes that can be made with just three ingredients, without milk or butter. Just mix eggs, sugar, and pancake mix, then bake in a heatproof bowl. The key to a fluffy texture is to whip the meringue well and then gently fold it into the egg yolk batter without deflating the meringue. The moist, gentle sweetness and egg aroma spread in your mouth, and it tastes even better with butter or honey as a topping. If you take precautions such as covering it with aluminum foil once the surface starts to brown to prevent burning, it's a snack that even beginners can easily make.