We use beet sugar from Hokkaido. Not only the temperature of the oven, but also the humidity is adjusted according to the condition of the dough, and the dough is carefully baked. As a result, the , which is the baked mark on the edge of the langue de chat dough, is a sign of delicious baking. By intentionally increasing the process of mixing the dough, it is produced using the “two-stage egg preparation method (Ito Confectionery original method)” that achieves a smoother and finer texture.