1. The ingredients are ready and the butter softens.
2. Mix butter, salt, sugar, and vegetable oil evenly.
3. Add egg white and lemon juice and mix well.
4. Add the sifted white shark cake mix and mix well
5. Knead into a soft dough.
6. Roll the dough into a rectangle 35 cm long and 5 cm wide. Brush the surface with egg yolk liquid, and draw lines with a fork.
7. Cut into two finger-wide pieces. Sprinkle a little black sesame on the surface.
8. In the middle of the oven, 180 degrees for 30-35 minutes. Remove from the oven and let cool.
Tips:White vinegar can be used without lemon juice
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