Cooking Steps

1. 

   Step1:Soften butter, add sugar and beat until loos

2. 

   Step2:Add the sifted ripe yolk and stir evenly

3. 

   Step3:Add sifted low flour and corn starch and knead them into dough

4. 

   Step4:Refrigerate the dough for an hour

5. 

   Step5:Knead the dough into small balls of uniform size, place them on the baking tray, and press them with your thumb

6. 

   Step6:Preheat oven 175 degrees. Top 20 minutes.