1. Prepare ingredients
2. Sift the yogurt to filter out the whey
3. This is filtered whey
4. Piping bag set on the cup ready
5. Stir yogurt and milk powder evenly
6. Add the egg whites in three times and add sugar to beat until stiff foaming
7. Add starch and beat evenly at high speed
8. Take half of the egg white paste and yogurt paste and mix well
9. Add the remaining half of the egg white paste and mix well
10. Stir the paste evenly
11. Put in a piping bag
12. Squeeze the batter into the baking tray, and preheat the oven at 100°C for the squeezing time
13. After squeezing it, put it in the oven and bake for 60 minutes at 100 degrees
