1. Stir water and oil evenly
2. Add rice flour and stir without dry powder
3. Add 6 egg yolks and 1 egg white and stir evenly
4. First use a whisk to whip the egg whites into a foam
5. Then add the sugar in three times and beat until the egg whites become hard and the sharp corners will not disappear.
6. Take one-third of the egg whites into the batter and stir up and down without making a circle
7. Then pour the stirred batter into two-thirds of the egg whites, add the chocolate beans and mix well
8. Pour the stirred batter into the mold, vibrate gently for a few times to shake out bubbles, preheat the oven at 150°C for 5 minutes, put it in the oven and bake up and down for 25 minutes, then bake at 160°C for 20 minutes
