In terms of its nutritional value and its wholesomeness, it is hard to beat, which is why the Silesians still appreciate it today.
Dilute milk with 1/4 l water and bring to the boil with a little salt. Mix the flour with 1/4 l cold water and add to the boiling liquid. After 10 minutes of cooking, add the butter and peel the soup with the whisked egg yolk. You can also cook cinnamon and lemon zest.