1. Prepare materials
2. Butter at room temperature, add sugar and stir well
3. Add egg yolk and beat well
4. Add flour, salt and soda and mix well
5. Add assorted oatmeal and walnuts, and mix well
6. After shaping, put it in the refrigerator for 20 minutes
7. Take out from the refrigerator and slice
8. Then press and put on the baking tray. 190 degrees 12 minutes
9. Take it out and let it cool, then turn it over and bake for another four minutes.
Tips:The temperature of the oven is different from each other, adjust by yourself
