1. Prepare two clean basins, which must be dry, without water and oil; prepare three eggs; an egg beater and 150 grams of flour.

2. Separate the egg whites and yolks and put them into two basins.

3. Beat the egg yolks, add 100 ml of milk and stir evenly.

4. Pour in 150 grams of flour and 1 gram of yeast powder, and continue to stir evenly.

5. Beat the egg whites with a whisk until creamy. Add sugar twice during the beating process, 5 grams each time. If you like sweetness, you can add more sugar. When you pick up the egg beater, it will have a tip, and that's it.

6. Pour the egg yolk paste into the cream, stir evenly up and down, and stir gently.

7. Add an appropriate amount of water to the steamer, bring to a boil over high heat, then put the cake batter in, cover it with a large plate, and cover the pot to steam.

8. 30 minutes. Turn off the heat and simmer for ten minutes. The steamed cake is ready and you can enjoy the deliciousness.