That's because the temperature is too high and the water evaporates. The foam is full of steam. Cook porridge with a small fire for a long time; When cooking noodles, boil the water first, and then put the noodles. In the process of cooking, you can leave the lid open or leave some space for the lid to let the steam escape in time. When cooking porridge, you should also pay attention to leaving a certain gap on the lid. In this way, there will be less foam and it will not boil.

Practice more, and the knowledge in the kitchen will gradually accumulate.