2. Pour the milk into the pot and heat it, but don't boil it. It will not be easy to form a milk skin after boiling. The heated fresh milk is poured into a container and placed in a ventilated place to wait for the formation of milk skin. Cut a hole with a knife or chopsticks.

3. Pour out the milk under the skin and leave a little milk in the bowl. In the bowl where the milk is poured out, a layer of milk skin is at the bottom of the bowl, and the egg yolk is separated from the protein, and the protein is scattered as much as possible.

4. Mix with the poured milk and sieve 1-2 times to remove foam. Add white sugar to the milk protein mixture, then pour the mixed milk protein solution back into the bowl along the mouth where the milk skin was cut before, and the milk skin at the bottom of the bowl will float up by itself. Cover the bowl with plastic wrap. Put cold water into the pot, and heat it for about 15-20 minutes. Do not open the lid, and stew for 5- 10 minutes before opening it. If you like, you can mix fresh fruit, raisins, honey red beans and so on to decorate and eat.