1. Add the softened butter at room temperature with powdered sugar and beat with an electric whisk until fluffy
2. Add the boiled egg yolk (can be sieved), then add corn oil in 3 times, stir well and then add to the next time
3. Finally, sift in low flour, cornstarch and milk powder
4. Mix and knead into a dough, wrap it in plastic wrap, and keep it in the refrigerator for one hour
5. After taking it out, divide it into small doses of even size, about 3~4 grams each, then round them and put them in a baking tray
6. Put it into the middle layer of the preheated oven, and bake at 170°C for 10-15 minutes. The temperature can be adjusted according to the temperament of the oven.
7. Finished picture
8. Finished picture
9. Finished picture
