1. protein and egg yolk are separated, and there can't be egg yolk in protein, otherwise it can't be made.
2. Put one third of the sugar into the egg white. While stirring with an egg beater, add sugar to the egg white for three times continuously until the egg white is in a fine foam shape and adheres to the egg beater.
3. Put the flour, egg yolk and salt into the beaten egg white and stir clockwise.
4. Apply a layer of vegetable oil to the inner container of the rice cooker, put the prepared batter into the rice cooker and sprinkle with raisins.
5. Press the "cake" button of the rice cooker, and after 30 minutes, the rice cooker cake will be out of the pot.