1. Main ingredient: low flour 7g.

2. Accessories: 3 egg yolks, 3 egg whites, 1g yogurt and 3g sugar.

3. Separate the egg white and yolk.

4. Add yogurt to the egg yolk.

5. Stir well to form egg yolk paste.

6. Sift in the low flour and stir well to form egg yolk batter.

7. Add white sugar to the protein three times and beat until it is dry and foamed.

8. Add one third of the protein paste to the egg yolk paste.

9. The scraper cuts and mixes from bottom to bottom.

1. Add another third of the protein paste.

11. Cut and mix slightly, without mixing well, and pour it back into the egg white paste bowl.

12. Continue to cut and mix evenly to form a cake batter.

13. put in a 6-inch cake mold.

14, shake out the big bubbles, cover the plastic wrap and put it into the steamer.

15. After the fire is aerated, turn to medium heat for 3 minutes, then turn it upside down and let it cool.