Put the butter in the microwave and melt it for use.
Protein and sugar powder is stirred with a manual egg beater until the sugar powder melts
Add butter and mix well
Add the mixed low-gluten flour and corn starch and mix well
Stir to thick
Spread the oiled paper on the baking tray and spread it evenly on the baking tray with a spatula. The thinner the better. The oven is fired 150 degrees, the middle layer, 15 minutes