Step 2: Add egg yolk and continue to beat evenly.
Step 3: Beat until there are no small particles, and it is best to be smooth.
Step 4: Pour in the sieved flour.
Step 5: Mix well with a scraper.
Step 6: Knead the dough, wrap it with plastic wrap and put it in the refrigerator for one hour.
Step 7: After taking it out, roll the dough into a slightly thicker piece through the plastic wrap, and then press it out with a mold.
Step 8: Put it in the middle layer of the preheated oven, 180 degrees, 10- 12 minutes, and observe that the color of the biscuit changes slightly.