1. Ingredients: 30g egg white, 30g fine sugar, 4g whole milk powder, 3g corn starch, a few drops of lemon juice.

2. How to make egg whites: Add fine sugar and lemon juice to egg whites and beat hard.

3. Sift the milk powder and cornstarch into the meringue, and mix evenly with a silicone spatula.

4. Put the piping nozzle on the cut edge of the piping bag, put the piping tape into the cup, and fill it with the meringue paste.

5. Line a baking pan with oiled paper and squeeze the meringue paste evenly into the baking pan.

6. Use an electric oven and preheat it at 100 degrees for 5 minutes. Insert the baking sheet into the middle and lower racks and bake for 40-45 minutes. Finally, let the remaining heat simmer for 5 minutes before taking it out of the oven.