1, casserole. When making soup, you can also choose a casserole with delicate texture and white inner wall. Don't use inferior casserole, because the enamel of inferior casserole contains a small amount of lead, which is easy to dissolve when cooking acidic food and harmful to the health. The newly bought casserole should be soaked in rice washing water for one night, so that starch can penetrate into the pores of the casserole and make its pores more compact. The casserole can't be burned empty. Before you put the casserole on the stove, you must first put in the ingredients to be cooked, and at the same time, you must cook it with low heat, and then turn it into medium heat after the soup in the casserole is boiled. If you need water during cooking, you should add warm water, because the temperature difference between cold water and soup in the pot will cause the casserole to burst.
2, crock. In the south, clay pots are mostly used to make soup, because they are clay made of raw materials that are difficult to transfer heat, such as timely, feldspar and clay. They are fired at high temperature and have good air permeability and adhesion, and also have the characteristics of uniform heat transfer and slow heat dissipation. When cooking soup, the crock can transfer the external heat to the internal materials in a balanced and lasting way, making the soup fresher and more mellow and the ingredients more crisp. Never put the crock directly on the marble desktop or tile floor, because the temperature difference will cause the crock to burst. The newly used crock needs to be cleaned when the temperature of the pot body is not too hot.