1. Soften the butter at room temperature and add in powdered sugar, mix well
2. Add the egg whites in two portions and beat until the color fades
3. Add the sieved low powder and mix well with a silicone spatula until no dry powder is visible
4. Cut a piece of greased paper with a length greater than 60 and fold it in half, knead it into a smooth dough with gloves, and place it in the middle of one side of the greased paper
5. Roll the dough into a 27 cm square, then put it in a baking tray and put it in the refrigerator to shape
6. The egg yolk and pork floss are beaten together with a food processor
7. Spread evenly on the surface of the dough
8. Cover with greased paper and roll it with a rolling pin to make the egg yolk and pork floss more fit the dough
9. Open the oil paper to see the effect
10. Roll up slowly from one side
11. Fold the round dough into a triangle and put it in the refrigerator to set for more than 2 hours
12. Preheat the oven at 160 degrees, take it out of the refrigerator and cut into small pieces of about 0.5 cm, bake for about 25 minutes, and wait until the biscuits are baked until they are greasy.
