2. Pour the milk into the pot, add the chocolate (occasionally 5 small pieces of rubber-sized milk chocolate), and stir until the chocolate is cooked, about 5 minutes.
3. Slowly pour the cooked chocolate milk into the beaten egg yolk and stir while adding it (otherwise the egg yolk will be cooked).
4, then cook it with a little fire, you can (there may be egg yolk in this process, it doesn't matter).
5. After cooling, put it in the refrigerator and freeze it (you should use an ice cream machine to stir it before freezing, even if you don't have it, you will be exempted), and you should take it out and stir it several times in the middle. A long waiting process, until there are soft sand-like small crystals. It's ok.
6. When it is not completely frozen, you can drink it as a milkshake.