Combine butter with sugar and mix until the substance becomes white; add the egg and stir and add to . Mix wellCover and rest in the fridge for at least 30 minutes.
Spread dough with a rolling pin until it is 0.2inch(5mm) thick. Use your favorite molds to form the cookies. Arrange on a parchment paper in rows of 4. Add a topping of sugared red beans or tea.
Bake in the oven for 17 min at 180°C (350°F)