1. Take two clean, water-free and oil-free containers to separate the egg yolk and egg white.
2. Add ten grams of caster sugar to the egg yolk and stir well.
3. Add the remaining fine sugar to the egg whites and beat until stiff foaming.
4. Mix the egg yolk and egg whites, and stir evenly.
5. Sift in low-gluten flour and continue to mix until a smooth and smooth batter.
6. Preheat the oven up and down at 185 degrees in advance, and put the batter into the piping bag.
7. Spread greased paper on the baking tray and squeeze out finger shapes on it, taking care to leave gaps.
8. Put the baking tray in the middle layer and bake at 185 degrees for about 12 minutes, and the edges are colored and ready to go out of the oven.
