Red bean buns, also known as anko buns, are a popular sweet steamed bun in East Asian cuisine. The buns are filled with a sweet red bean paste made from adzuki beans, sugar, and sometimes flavored with ingredients like matcha or sesame. The filling has a smooth and creamy texture, providing a delightful contrast to the soft and fluffy bun. Red bean buns are often enjoyed as a dessert or as a snack with tea or coffee.