The word Soufflé comes from the past participle of a French verb souffler, which means "swell" or just "swell".
1. Separate the egg white from the yolk.
2. Mix flour and cream to make dough.
3. Boil the milk until it is slightly boiling, add the dough, stir well, and add the egg yolk after leaving the fire.
4. Add sugar to protein until it is soft (warm) and frothy. Add 1/3 beaten protein into the batter and stir quickly and evenly. After mixing well, pour all the batter into the remaining protein.
5. Wipe the model with butter, dip it in fine sugar, pour out the excess sugar, then pour in the batter, put your thumb on the edge of the model, and wipe out the groove by rotating, so that the middle will naturally stand up after baking.
6. Preheat the oven in advance 160 degrees, and bake it 15 minutes or so.