1. The butter is softened at room temperature and beaten with sugar.
2. Send it to the picture.
3. Add the egg yolk and continue to stir
4. Add low powder, baking powder and milk powder
5. Live into dough, as shown in the picture.
6. Use the fresh-keeping bag to trim the cuboid
7. After freezing for 1 hour, take it out and cut into slices, 5-6mm thick.
8. Brush the surface with egg yolk liquid, preheat the oven, and bake at 180 degrees for 18-20 minutes. Put it on the drying net to let cool.
9. The prepared egg yolk biscuits can be started.
