First, the first step is to boil the milk. When there is a little bubble beside the milk can, you can turn off the fire. Pour the milk into a bowl and let it stand until the milk skin is exposed.

3. Divide the egg whites, add sugar, stir well, gently stir well without great force, carefully pick up the milk skin with a toothpick, pour the milk into the egg whites, and leave the milk skin in the bowl.

4. Stir the milk and egg whites evenly. At this time, you can taste the taste, whether it is sweet enough and filter the milk mixture. If you see caked protein, you can mix it with milk in the filter.

5. Pour the milk back into the bowl with milk skin. At this time, you will see the milk skin floating at the bottom, wrapped in plastic wrap, and steamed on high fire for 10 minutes.