Classic Red Bean Taiyaki is a popular Japanese street food that consists of a fish-shaped cake filled with sweet red bean paste. The cake is made from a simple batter of flour, sugar, baking powder, and water, which is poured into a fish-shaped mold and cooked until golden brown. The red bean paste filling is made by simmering adzuki beans with sugar until they become soft and sweet. The combination of the crispy exterior and the smooth, sweet filling makes for a delightful treat. Enjoy this classic taiyaki recipe as a snack or dessert!