生牛奶要煮沸后，等沫下去，再煮沸，反复煮几次才好，具体做法如下：
准备材料：生牛奶适量、奶锅
步骤一：把牛奶倒入锅中，开火；
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步骤二：煮到牛奶开锅，沫沫翻上来关火；
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步骤三：关火沫沫就下去了，如此反复煮几次，就可以了。
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步骤四：成品。
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