1. Raw material collection
2. The butter is softened and beaten until smooth
3. Add salt and sugar
4. Dispense until the volume is enlarged and the color becomes slightly lighter
5. Add the egg mixture and beat until it blends with the butter thoroughly
6. Sift in low powder
7. Stir into dough
8. Arrange the dough into a rectangular shape, wrap it in plastic wrap, and freeze it in the freezer of the refrigerator until it is hard. It takes about 45 minutes
9. Take out the frozen dough, brush with a layer of egg white liquid on the sides, and dip a layer of white sugar
10. Cut the dough with white sugar on all sides into 5 mm thick slices with a knife
11. Place the biscuit dough on the baking tray lined with tin foil
12. Middle layer, fire up and down, 180 degrees, 15 minutes, until the surface color is golden
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