1. Wash the spinach and squeeze the spinach juice with a juicer
2. Take the required amount
3. After preparing the other ingredients, prepare two clean, water-free and oil-free basins, separate the eggs, pour corn oil and spinach juice into the egg yolks, stir evenly with a manual whisk, and sift into the low flour
4. Mix well until there are no particles
5. Add 2 drops of white vinegar to the egg white, beat with an electric whisk, add the sugar 3 times, beat until hard foaming, turn on the oven to preheat at 150 degrees for 5 minutes
6. Stir half of the egg white and egg yolk paste or cut and mix well, then stir the remaining egg whites evenly
7. Pour into the mold and shake it twice
8. Put it in the oven at 150 degrees for 50 minutes, bake it, take out the upside down and let cool
