1. Prepare the required materials
2. Take out the yolk of the boiled egg and put it on a sieve for later use
3. Mix butter, sugar, and salt softened at room temperature and beat together
4. Beat the butter until the color becomes lighter and feathery
5. Then add the egg yolk to the whipped butter and beat evenly
6. Flour, cornstarch, and milk powder are mixed and sifted into the yellow and then stirred until they are mixed together by hand
7. Take about 6 grams of dough and knead into balls
8. Gently press the middle with your fingers to form a slightly cracked pattern (press gently and slowly, otherwise it will loosen easily)
9. Preheat the oven to 190 degrees for 5-10 minutes and bake for 15-20 minutes. Each oven is different and needs to be studied slowly.
