Cooking Steps

1. 

   Step1:Mix egg yolk with 20 grams of sugar. Beat until thick. Add oil three times. Mix well.

2. 

   Step2:Add the milk. Mix well and add the sifted salt and low flour. Mix well with a scraper. The remaining sugar is added to the protein three times. Beat the protein to 8 and distribute.

3. 

   Step3:Mixed egg yolk protein paste. It is divided into two parts. Sift the cocoa powder into one of the batters, mix well, and put them into the flower mounting bags respectively. Squeeze the batter into the baking tray with oil paper.

4. 

   Step4:After removing the air bubble, put it into the preheated oven at 170 ℃ for about 20 minutes. After baking, remove the bottom oil paper and put jam on it. Roll it up while it's warm. Set for 30 minutes.