This video shows you how to make super-slim cookies in three flavors: milk, matcha, and chocolate, that stay crisp even after time has passed. The basic mixture consists of melted butter, milk, egg yolks, and salt. To make the dough, add sifted cake flour, powdered sugar, and the appropriate amount of powdered milk for each flavor (40g for milk, 36g for matcha, and 35g for chocolate) and flavoring powder (4g for matcha and 5g for cocoa). The dough is then rolled out thinly, cut out shapes, and baked in the oven. The result is a simple process of making cookies with a delicate texture and rich flavor. The key to a clean finish is to work quickly to prevent the dough from melting and to let the cookies cool completely before peeling them off the baking sheet. This recipe is perfect for gifts or enjoying at home and is recommended even for beginners.