1. Boil 2 eggs, take the yolk, press it with your fingers, and sieve the yolk into a yolk.
2. The butter is softened at room temperature, add powdered sugar and salt
3. Beat with a whisk until the volume is slightly enlarged
4. The color becomes lighter and puffy
5. Pour in the finely sieved egg yolk and mix well
6. Pour in the sieved starch and low-flour flour and mix well
7. Knead the dough by hand (the dough is a little bit dry, a bit like muddy skin) and put in the refrigerator for 1 hour
8. Take out a small piece of refrigerated dough, knead it into a small ball, place it on a baking tray lined with tin foil, flatten it with your big female finger, and naturally crack it
9. Prepare all the biscuits and put them in the preheated oven. The middle layer is about 160 degrees and 20 minutes, and the edges are slightly yellow.
Tips:1. The baking time is set according to your own baby
2. The yolk must be sieved
