Egg white bubbles because constant stirring will bring in a lot of air. Egg white will wrap bubbles, so it will turn into foam. The principle of delivering eggs or cream is to blow air. If you don't send it away completely, you will see many small bubbles when you stand still. When breaking eggs, a lot of air enters, producing a lot of bubbles. At this time, when you fill the tower powder or cocoa powder, you can fill those bubbles to form molded cream.
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