Cooking Steps

1. 

   Step1:Melt butter in microwave. Add yogurt. Mix wel

2. 

   Step2:Add egg yolk in turn. Stir wel

3. 

   Step3:Sift in flour. Mix wel

4. 

   Step4:To make a protein cream, add sugar in three times, and beat until there is a sharp corner.

5. 

   Step5:Mix a third of the protein in the batte

6. 

   Step6:Mix the batter into the remaining protei

7. 

   Step7:Oil paper cutting pad under. Apply some oil on the edge. Pour in batter. Shake out bubble

8. 

   Step8:Preheat for 10 minutes. Add water to the baking tray. Wrap the movable bottom mold with tin paper. Bake at 170 ℃ for 40 minutes