Cocoa Roll Shortbread
1.
After the unsalted butter is softened, add sugar and beat well, add egg whites in three times, beat until fully dissolved
2.
Add the sifted flour and grab it with your hands to form a uniform dough
3.
Divide the dough into 2 portions, add cocoa powder to one portion, and knead into cocoa dough
4.
Roll the 2 pieces of dough into rectangular pieces of the same size, stack them together, roll them up, and gently roll them on the table into a beautiful cylindrical shape. Put in cling film, refrigerate and shape, about 2 hours
5.
Cut the dough into uniformly thick round slices
6.
Preheat the oven at 165°C for about 20 minutes. After turning off the heat, continue to simmer in Chinese for 10 minutes.