Begin by preheating your oven to 180°C. Next, combine the flour, soy bean flour, sugar and baking powder in a bowl and mix with a whisk.
Slowly add the milk and vegetable oil, mixing once more. When the batter is smooth, with no lumps, add the sweet red beans and mix until well combined.
Spoon the mixture in paper cupcake cases, before baking for about 20 minutes. While your cupcakes are baking, you can prepare the matcha green tea icing.
Mix the single cream and matcha powder to create a smooth green tea paste.
Cream together the butter and sugar together, adding the sugar little by little. Finally add the matcha paste and continue mixing until smooth and fluffy. Once your cupcakes are baked, let them cool off on a wire rack and decorate them with the matcha green tea icing using a bento decorating pen.
• Don’t refrigerate your icing as this will cause it to set.
• If you are not a huge fan of the matcha flavour, you can use vanilla, chocolate or any other type of icing. Try a sprinkle of some black sesame seeds for extra Japanese flavour.